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[[quoteright:307:[[Manga/FutureDiary http://static.tvtropes.org/pmwiki/pub/images/2de0a85d3349cd18ed86707c887f0f04.png]]]]
[[caption-width-right:307:Don't try befriending Yukki.]]

->''"As I told Lady Freeze when I pulled her plug, this is a ''one''-woman show."''
-->-- '''Poison Ivy''', ''Film/BatmanAndRobin''

{{Love Triangle}}s are tricky business. Trust us, [[TriangRelations we've already done the math]].

It can get particularly twisted when some sides of the triangle are completely one-sided. Bob is in love with Alice, but Alice not only fails to realize it, but is already in a relationship with Chris. This is a classic recipe for drama (or humor), but sometimes, it goes too far.

Sometimes, somehow, Bob gets the idea that Chris is the one [[GreenEyedMonster in the way]] of Bob's happiness with Alice, and if Chris were to somehow have an [[MakeItLookLikeAnAccident "accident"]], then surely Alice would come to love Bob instead. It's true -- LoveMakesYouEvil and these characters are NotGoodWithRejection.

Not always the best thought-out plan, no. Sometimes, Bob may not even consider what would happen if Alice ever found out. In fact, in a lot of these situations, Bob doesn't even make any effort to hide his actions from her and seems to be convinced that she'll somehow fall in love with him as soon as he kills Chris.

If this isn't TheReveal for a {{Yandere}}, it's still their most shocking moment.

Compare OppositesAttractRevenge and ComfortingTheWidow. Contrast IWantMyBelovedToBeHappy, which may be subverted into this trope, and vice versa. Also compare the ScarpiaUltimatum, where the threat to murder the hypotenuse may or may not be carried out. Contrast IfICantHaveYou, for when it's the Cathetus (Alice, for those a little rusty on their geometry) that will be murdered. If this is done indirectly by setting the hypotenuse up to be killed, it's either TheUriahGambit (if Bob does it intentionally) or DeathOfTheHypotenuse (if the intent is limited to the author). Extreme SubTrope of RemovingTheRival.

When the fanfiction writers do this, it's DieForOurShip. If the hypotenuse is a friend, it's FriendVersusLover. If the character kills him/herself instead, it's SpurnedIntoSuicide.

[[ComicallyMissingThePoint Note that the triangle must be a right triangle for this to apply]]. If it is an equilateral triangle, {{Polyamory}} occurs, though if you have a PsychoticLoveTriangle going on, things may ''still'' not end well. And of course, this isn't meaning ''literally'' murdering the hypotenuse.

'''Beware of spoilers.'''



[[folder:Anime and Manga]]
* ''Manga/KaguyaHime'': Mayu lets her mother die in front of her eyes for making both Akira model nude for her and coercing Akira into a same sex relationship with her. She also threatens to kill anyone Akira gets involved with.
* ''Manga/FutureDiary'':
** It's shown very clearly that [[{{Yandere}} Yuno Gasai]] (pictured above) would be all too willing to kill ANYONE who got in the way of her "love" with Yukiteru (including his mother and father). In fact, Yuno is even willing to kill anyone who is less than ten feet away from Yukiteru simply because they are less than ten feet away from him. Heck, she's even willing to kill Yukiteru AND HERSELF just to be with Yukiteru. Essentially, if she doesn't kill him the world will end and they will both die. [[spoiler: If she does kill him then she can go to a different world's timelime, kill that timelime's version of herself, and then be with that timeline's Yukiteru. She doesn't seem to really mind that each of the world's Yukiteru are technically different people since her "love" for him is just to satisfy herself, at least until the end of the story, and she herself admits this.]]
** A less lethal version of this seems to be executed by Aru Akise, who has a [[HoYay crush]] on Yukiteru. He [[spoiler: goes through the trouble of researching everything about Yuno's background to try to dig up dirt on her, and exposes it to Yukiteru, telling Yukiteru to "get away from her."]] Chapter 50 seems to have confirmed this. [[spoiler: When Yuno shows up, Akise glares at her, declares "I won't hand over Yukiteru to you!", and forcefully kisses Yukiteru. This sends Yuno into a rage and she comes at Akise with a knife. Akise tries to kill Yuno, because he believes she's trying to kill Yukiteru, and destroy her diary but ends up failing, because it turns out Yuno had two diaries, and she ends up stabbing him]]. In the following chapter [[spoiler: despite having just been stabbed by Yuno and sliced across the throat, Akise gets back up out of sheer determination (and love for Yukiteru) and texts an important message to Yukiteru even though Yuno ends up cutting off his head completely]].
* ''VisualNovel/SchoolDays'':
** The ending to the anime, where [[spoiler:Kotonoha]] violently Murders The Hypotenuse, [[spoiler:right after the Hypotenuse, Sekai, murders the lead, Makoto, thus killing the triangle]].
** This was reversed in the manga, where [[spoiler:''Kotonoha'']] is the Hypotenuse that ends up killed after trying to kill [[spoiler:Sekai]].
* This is often the path villains take in ''Anime/SailorMoon''. Beryl, Ann, and Black Lady try to kill Usagi to get Mamoru, while Al and Diamond try to kill Mamoru to get Usagi. Emerald also tries to do in Usagi to win Diamond.
** Fiore in the ''R'' movie tries to kill Usagi both because she is Sailor Moon ''and'' out of jealousy over Mamoru, [[HoYay whom he is attached to]] because of how kind he was to him when they were kids. [[spoiler:He gives up on it by the end and even sacrifices his LifeEnergy to revive Usagi when she dies saving the earth.]]
** Also invoked by Al and Ann from the Makaiju FillerArc, especially in the end when [[spoiler:Al orders the tree to kill Mamoru so he can have Usagi, then Ann retorts by ordering it to kill Usagi so she can have Mamoru. This sends the Makaiju into a VillainousBreakdown where it goes KillEmAll. It all gets better in the end, though, and Al and Ann leave Earth together and free of their {{Yandere}}ness.]]
* In ''LightNovel/HaruhiSuzumiya'', Haruhi is willing to [[spoiler:destroy and rebuild the entire UNIVERSE again with only her and Kyon]] if anyone gets too close to Kyon and she becomes jealous. Mikuru's closeness to him along with her boredom caused the first incident... [[spoiler: ''without Haruhi even noticing that she had done so''.]]
* ''Manga/PeachGirl'':
** Sae hates Misao for being the one Ryo loves since she loves him herself and, at one point, tried to push her into the path of a moving bus. However, Kairi restrained her at the last second so she wasn't able to.
** Kairi's trio of {{Clingy Jealous Girl}}s absolutely '''hate''' Momo for winning Kairi's affections. They make a habit out of harassing/threatening her, once deliberately made sure she got separated from Kairi and was stranded during a class trip, ''push her into the path of a camp fire when she was holding cooking oil'', and, at one point, held her down, and told her that she has to sign a contract swearing that she'll stay away from Kairi or they'll burn all her hair off (while holding a lighter to her hair), and try to beat her up later on when she states that their selfish and cruel actions won't make Kairi fall in love with them, and when she tells them that her love for Kairi is genuine. In addition, they take the threat even further with "We'll burn your face so badly that Kairi won't ever look at you again," and "Don't worry, we'll push you into the pool before your whole body catches fire."
* ''Manga/PeacemakerKurogane'': In the manga, Suzu comes to this conclusion when Ryoma decides to take Tetsunosuke away from him.
* ''Anime/CodeGeass'':
** [[spoiler:Rolo]] does this to [[spoiler:Shirley, Lelouch's "girlfriend"]], not because of ''her'' connection to Lelouch, but because he wants to kill [[spoiler:Nunnally]] and stop ''her'' from coming between him and Lelouch. [[spoiler:Shirley]] was an obstacle in making that happen, as she told Rolo that she wanted [[spoiler:to reunite Lelouch and Nunnally]] and thus she had to go.
** Mao's treatment of Lelouch seems this way at first - C.C. [[spoiler:originally made a contract with him, but]] abandoned Mao and made one with Lelouch instead. So Mao tries to kill him [[spoiler:by manipulating a girl who has unrequited love for Lelouch, turning into a temporary {{Yandere}}. It fails.]] Somewhat averted in that [[spoiler:Mao offers to leave Lelouch alone if C.C. comes with him. Concerned with losing one of his best allies, however, Lelouch prevents this. After that, Mao directly goes after Lelouch in the most potentially destructive manner possible.]]
** V.V., who looks like a kid but is ReallySevenHundredYearsOld, became psychotically devoted to his younger twin brother Charles after their mother's death and [[spoiler:killed his sister-in-law Marianne, Charles's favorite wife and his Knight,]] out of jealousy when they started getting too close.
* ''Manga/RanmaOneHalf'' makes good use of this trope, given its base is a mixture of ArrogantKungFuGuy and LoveDodecahedron. {{Fanon}}, however, tends to greatly exaggerate it for various characters who have used it or hold similar attitudes.
** Tatewaki Kuno: Has never actually tried to kill Ranma for Akane or "the pigtailed girl's" hand, and doesn't even seem to want to kill Ranma in their fights. His attitude of "if I beat up Ranma, then the girls I want will naturally flock to me for proving my studliness" does fit under the general umbrella of this trope, but lethal force is not his intention. Though... there is the way he starts swinging around a live steel katana instead of his [[WoodenKatanasAreEvenBetter bokken]] during the UsefulNotes/{{Tanabata}} and Failed Wedding stories, which probably inspired his fanon reputation.
** Kodachi Kuno: Joined in with Ukyo and Shampoo in attacking Nabiki during the "Nabiki, Ranma's New Fiancee" manga arc, in hopes of killing her and taking him for herself. Similarly, teamed up with them to beat up Miss Hinako during the manga arc she was introduced in, as she suspected the teacher was trying to seduce Ranma. She did show at the Failed Wedding in a wedding gown of her own and planning to marry Ranma herself, but wasn't slinging bombs around like Ukyo and Shampoo.
** Ukyo Kuonji: Generally prefers more "nonviolent" approaches to trying to win Ranma, such as setting Akane up on a date with Ryoga, trying to lure Ranma & Akane into a magical {{Kimodameshi}} that will supposedly break them up irrevocably, or agreeing to let Ranma stay at her home after he is kicked out (and, later, to let him use her business as a wager on the condition he will join her in resuming her travels if he loses it) in hopes that this will make him "realise how perfect she is for him". However, she ''can'' go about it violently as well; she willingly joins in with Shampoo and Kodachi when they attack Nabiki with plans to kill her and then fight over who gets Ranma, and is the one who suggests Hinako might be trying to seduce Ranma and leads the other two girls in ambushes on her. She shows up at the Failed Wedding throwing bombs, though possibly at Ranma rather than Akane, and wonders why she didn't think of it herself when Kodachi reveals her plan to use this ceremony as a way to marry Ranma at last. In the anime, though the aforementioned attacks on Nabiki and Hinako are removed, Ukyo plots to herself about killing Akane when she asks for her help in the second of the "One to Carry On" {{filler}} {{OAV}}s and begins throwing random heavy objects at her, growing angry when Shampoo throws something at her and leaving a clear impression she thought that she and Shampoo would work together to kill Akane, and then finish fighting each other.
** Shampoo: Given she stated "obstacles are for killing" when Ranma tried to prevent her attacking Akane for Ranma's hand in her first story, it's understandable that she gets hit with this trope the most -- in canon and in fanon. Fanon usually overstates her actually ''trying'' to kill her rivals, though. Canonically, while the idea doesn't seem to bother her in the slightest, it isn't something she tries all of the time. Notably, when she first thought Akane was an obstacle to pursuing Ranma's hand, she actually just [[LaserGuidedAmnesia wiped her memories of Ranma]]. Then, when it looked like Akane might be breaking through the memory block, she tried to strengthen the block, only attacking after Akane did break through the block and kept interfering -- and even then, she stopped attacking Akane the moment Ranma told her not to. After that, though, she tried to give Akane a Jusenkyo Duck curse in order to "pawn" Mousse off on her, plotted to murder Akane and pin the blame on Taro in the first Pantyhose Taro story, was the first to suggest attacking Nabiki during her stint as Ranma's fiancee in the manga, joined in Ukyo's plot to beat up Hinako in the manga, came up with the same plan as Ukyo in "The One To Carry On, Part 2" and wrecked the plan by attacking Ukyo first instead of Akane... the final manga story arcs, Jusendo and the Failed Wedding, had a {{Brainwashed}} Shampoo (who, given she was obediently sent to murder Ranma, even if she did muster some [[HeroicWillpower Villainous Willpower]] to try and wriggle out of obeying, was arguably BrainwashedAndCrazy) threaten to pop off the dollified Akane's head and a normal Shampoo attacked Akane & Ranma with bombs at the wedding ceremony.
** Mousse: Introduced to the series specifically challenging Ranma for the right to Shampoo's hand, threatening to take Akane if Ranma couldn't beat him. On his return, attempted to murder Ranma by using him/her as the target in a knife-throwing act (Ranma managed to catch the knives in her teeth) and then chased him around the circus throwing daggers and water balloons full of Jusenkyo Duck water at him. Shortly after that, he kidnapped Akane and threatened to douse her with said Jusenkyo water, in reality planning to either murder or curse (whichever came first) Ranma when he raced to Akane's rescue. He then challenged Ranma to yet another duel to win a date with Shampoo. Repeatedly throughout the series, Mousse challenges Ranma to fights because, like Kuno, he thinks that beating Ranma will make Shampoo fall in love with him -- unlike Kuno, Mousse doesn't seem bothered by the idea of killing Ranma if that's what it takes to win, though he has never actually "won" except in fights where he had other things on his mind and so passed over the opportunity to deliver the coup de grace.
* ''Anime/StreetFighterIITheAnimatedMovie'': [[EffeminateMisogynisticGuy Vega's portrayal]] here was a large part of the reason that gamers thought he was gay, until Creator/{{Capcom}} set the record straight years later. When he sees [[BigBad M. Bison]] perving on a live video feed of Chun Li, Vega visibly becomes jealous. Which doesn't go unnoticed, so Bison gives him the order to kill her. Vega acceptes without a moment's hesitation... [[spoiler: except [[KickChick she kicks his ass]] out of her apartment. [[http://www.youtube.com/watch?v=7qXFunYSsc8 Literally]]]].
* On the topic of Kaishaku's works, an interesting case of this occurs in ''Anime/ShatteredAngels'' where resident PsychoLesbian Mika Ayanokoji tries to sacrifice the hypotenuse. Ultimately it's cut short before anyone's sacrificed, but is ironically turned around when Mika is [[ImpaledWithExtremePrejudice killed off rather nicely]].
* Kish from ''Manga/TokyoMewMew'' is a stalker who constantly attempts to get rid of Ichigo's boyfriend Masaya. He even attempts to kill Ichigo herself if she refuses to become "his".
* In the second to the last episode of ''Anime/MobileSuitGundam00'', [[spoiler:Andrei Smirnov]], who is in love with [[spoiler:Louise Halevy]], attempts to do this to [[spoiler:Saji Crossroad, Louise's [[StarCrossedLovers long-distanced boyfriend]], [[FreudianExcuse blaming him]] for her [[IllGirl deteriorating condition.]]]] Luckily, [[spoiler:Setsuna]] is there literally (their [[CombiningMecha mechas]] anyway) just behind [[spoiler:Saji]] to prevent it. He tried to do it directly, [[spoiler:but failed.]]
** A mildly-popular theory that was ultimately {{jossed}} by canon invoked this, via speculating that [[spoiler:Billy Katagiri had caused the incident that led to the death of Emilio Ribisi, all to get close to Emilio's girlfriend Leesa aka Sumeragi. In truth, it was Sumeragi and Kati's own mistakes that brought said disaster; Billy ''did'' later show {{Yandere}} tendencies for her, but in ''this'' he had nothing to do.]]
* And in ''Anime/MobileSuitGundamZZ'' there's Beecha, who [[spoiler:plotted with Mondo to have Judau killed by unknowingly using real bombs that the two lied were fake.]] This is due to Beecha's jealousy over Elle swooning over Judau and the feeling that he needed Judau out of the picture to make himself look like a better match for Elle. [[spoiler:Fortunately, it fails.]]
** A non-romantic (we really hope) version also occurs, with Puru briefly attempting to murder Leina Ashta, because she wants to be Judau's little sister and is well-aware that Judau cares for Leina more than he does her. Judau manages to talk her out of it by promising that all three of them could be a family together after the war was over.
* A ZigZaggedTrope in ''Manga/HellTeacherNube''. [[spoiler:Yukime ''was'' willing to kill her love rival, Ritsuko, but '''only''' after a very cruel BreakingLecture from her father's lackey Ippon Datara, in which he first hit all of the girl's weak points and then told her that, if she wanted to become human and be able to be with Nube, she'd have to kill Ritsuko. So Yukime kidnaps Ritsuko and restrains her, [[ApologeticAttacker apologizing all the way through said murder attempt]]... but she then decides that no, she '''can't''' kill someone who has done nothing wrong to her, and lets go of her. Which ends up with ''Yukime'' dying as she's tortured to death by Datara. (She gets better, however).]]
* In ''Anime/MaiHime'', Shiho Munakata is in love with her childhood friend Yuuichi Tate, who's in love with Mai Tokiha. When Shiho comes to believe that Mai is stealing Tate away from her (more due to Tate's actions than Mai's), she attacks Mai to keep her out of the way permanently, which isn't helped by [[spoiler:Nagi]] preying on Shiho's insecurities later. [[spoiler:The true tragedy is that, as Mai realizes in the fight, due to the mechanics of the whole Himelander thing going on, if ''either'' of them loses the fight (since Mai realizes ''she'' is beginning to develop feelings for him, as well), Tate will die. This doesn't stop Shiho, though, as [[DespairEventHorizon she's gone over the deep end already]], and Tate finally dies after Mikoto kills Shiho's Child.]]
* PsychoLesbian Tomoe from ''Anime/MaiOtome'' wants Shizuru, and is perfectly willing to harm or kill anyone whom she perceives as a threat to her ultimate goal. This leads her to do nasty things to Arika, whose {{fangirl}} crush is seen as stealing away from any attention that might otherwise have gone to Tomoe. On top of that, Arika isn't even a real contender in this LoveTriangle - that honor goes to Natsuki, Shizuru's [[BodyguardCrush boss]].
* Played with in ''Anime/SpeedGrapher''. [[spoiler:DarkActionGirl Ginza is desperately in love with her friend Saiga, admits to be ''really'' jealous of his protegée Kagura (and once returns her to her mother, the one Saiga is trying to free her from) and ''does'' admit out loud that she'd love to kill her... but in the end, she decides to protect Kasgura with her life, since Saiga made her promise that she'd protect Kagura.]]
* In ''Manga/TheLaughingTarget'', the protagonist has a [[KissingCousins cousin]] to whom he made a ChildhoodMarriagePromise. However, he eventually grew up, moved on, and started dating a girl at his school. When the cousin moves in with the protagonist (after her mother's [[SelfMadeOrphan mysterious death]]), it turns out that she ''hasn't'' moved on - and she's ''very'' unhappy with the new girlfriend for taking what's rightfully hers...
* The whole plot of ''Manga/{{Area 88}}'' is that Shin's (now former) best friend ships him off to a war in the hopes that he'll get killed, so he can marry Shin's girlfriend, the daughter of his company's CEO.
* Creed from ''Manga/BlackCat'' does exactly this to [[spoiler:Saya]] when Train started developing a deep friendship with her. When that didn't manage to convince Train to come to him, Creed decides that it is now Train's HeterosexualLifePartners fault and tries to kill him. He tries to do this to [[spoiler:Sven and Eve]] later in the series.
* ''Manga/DeadmanWonderland'':
** Genkaku attempts this ''twice'' with the girls he thinks Nagi is interested in. He stabs Karako when she gives Nagi a CooldownHug, calling her a "shitty girl," and telling her not to touch Nagi. He also is shown to be very agitated and jealous when he insinuates that Shiro is someone close to Nagi, saying that Nagi "never learns," and that he'll just have to punish him again (which he tries by attempting to have Shiro and Karako raped). It's especially interesting to note that ''he'' was also the one that killed Nagi's wife in the beginning.
** Masaru "Chaplin" Sukegawa was imprisoned after murdering a woman that her lover was caught with. Though she didn't specifically aim to murder that person, she still did it [[spoiler:since her Branch of Sin manifested there.]]
** [[spoiler:Shiro]] did this in the first chapter/episode. She slaughtered Ganta's ''entire class'' out of jealousy, and then proceeded to show Ganta Mimi's severed head.
* ''LightNovel/FullMetalPanic''. When it comes down to it, this is pretty much what [[spoiler:Gauron]] tries to do to Kaname, because he's angry that Sousuke fell in love with her.
* A variant of sorts occurs in ''Manga/FistOfTheNorthStar'' in regards to Shin, Yuria and main hero Kenshiro. Shin is in love with Yuria, who is in a relationship with Ken. The variant here though is that Shin seems relatively self-restrained... until Jagi, Ken's arsehole brother, comes along and convinces Shin that Ken is too weak to protect Yuria and that Yuria would end up dead if she stayed with Ken any longer. Result? Shin and Ken fight, Ken loses, Yuria declares her false love for Shin to spare Ken's life and he takes her to his Southern Cross kingdom and some time later, Ken confronts him there.
* Loli and Menoli of ''Manga/{{Bleach}}'' attempt to do this to [[TheMedic Orihime]] due to their [[BigBad boss]] having an interest in her [[BarrierMaiden powers]].
** Rukia's [[spoiler:adoptive younger sister Homura]], and to another extent her [[spoiler:adoptive younger brother Shizuku]], from the third movie wanted to kill all the Shinigami to keep them from coming between them and Rukia.
** Orihime's hollowfied brother Sora also qualifies, trying to kill Ichigo (and Tatsuki, though less so) for taking his place in Orihime's heart.
* ''Manga/AngelSanctuary'': That's pretty much the motivation for Rosiel's schemes against Sara. Alexiel won't wake up permanently (shows up in moments of need but always gives back the control to Setsuna) because her current reincarnation is extremely happier. So Rosiel figures that if Setsuna could not be happy anymore... And yes, Rosiel and Alexiel are brother and sister, but that barely matters to the point of this trope. And even if it did, Sara and Setsuna are too, but that didn't keep her from being overjoyed when [[spoiler:she believed to be carrying his child.]]
** And on a straighter example, Layla set up her (successful) love rival to be killed ''by the man they both loved''. Pretty cruel for all of the involved.
** And while Raphael doesn't actually try to kill Setsuna, he does make it very clear he'd be glad to step in should Setsuna die.
* Suruga from ''LightNovel/{{Bakemonogatari}}'' is infatuated with Hitagi. So much so that she starts stalking Koyomi after he hooks up with Hitagi and tries to beat him to death ''twice''. Doesn't manage only because of Koyomi's amazing regenerating ability. [[spoiler:I bet having been thrown around the room and then pulled back by your intestines would kill a normal person]]
* ''Manga/InuYasha'':
** When Koga first decides (completely unilaterally and over the course of about five seconds) that Kagome is "his woman." Upon realizing that Inuyasha is possibly in the way, Koga cheerfully proclaims that he will simply have Kagome by killing Inuyasha. He proclaims this ''to'' Kagome. He's blissfully unaware that she might have a problem with the idea. (He doesn't actually do it, of course, or even really try. But the logic is the same).
** Onigumo/Naraku tries to kill Inu Yasha several times because of his "love" for Kikyou. Although it's a little iffy due to the majorly conflicting motivations between his human and youkai sides, which hate each other as well.
** Kikyou once tries to murder Kagome because she is "in her way", and attempts to drag Inuyasha to Hell with her. She loosens up as her rage at the world disminishes and then she focuses on destroying Naraku for once and all.
* ''Manga/GetBackers'': Takuma Fudou to Ginji, over Ban. "When you're around, Midou doesn't even notice me. Midou's eyes are not on me... because you're in the way!"
** Kazuki's gang, Fuuga (lit. "Elegance"), is really into the HoYay. There's some kind of Toshiki/Kazuki/Juubei LoveTriangle, apparently; Toshiki even attempts to MurderTheHypotenuse, claiming that Kazuki never paid any attention to him when Juubei was around.
* Jegan fakes this in ''Manga/RaveMaster''. He kills everyone ''but'' the other two members of the love triangle (since he happens to be friends with the guy his crush liked more) then convinces each of him that he killed the other.
* ''Manga/OutlawStar'': Harry attempts to get rid of Gene in episode 21, once he realizes Melifina was in love with him. And tried to do the same to [[BigBad Hazanko]] for coming between them at the [[spoiler:Galactic Leyline]]. Neither attempt ends well for Harry, [[AlasPoorVillain especially the latter.]]
* ''LightNovel/BakaAndTestSummonTheBeasts'': [[PsychoLesbian Miharu's]] reaction to seeing anyone trying to come between her and Minami (who is not even interested in her) is to chase that person down and try to kill them.
* Mizore in ''Manga/RosarioToVampire'' tries to kill the rest of Tsukune's harem and turn Tsukune himself into a popsicle so she can have him all for herself. However, once she's added to the harem she becomes friends with her love rivals and continues to stalk Tsukune. She says herself that she doesn't really "need" to stalk him anymore, it's just "more fun."
** In chapter 52 of manga season II Akuha is revealed to be a {{Yandere}} [[LesYay for Moka]]. She attacks Kurumu and Mizore saying that she will kill anyone who tries to take Moka from her.
** In chapter 53 she announces her intentions to kill Tsukune after learning he and Moka are together.
* ''Anime/NeonGenesisEvangelion'': Naoko Akagi was sexually involved with Gendo Ikari after the death of his wife Yui Ikari, though it is suggested that Naoko wanted Gendo before, as she described Yuis disappearance as being exactly what shed hoped for. Naoko still strangled the first Rei Ayanami when the child said that Gendo considered Naoko as an "old hag" and no longer useful (Reis resemblance to Yui might also have been a factor, as Yuis face appears superimposed over Rei 1s as she speaks to Naoko). She was later horrified that she had done so and committed suicide.
** Also, Ritsuko Akagi was romantically involved with Gendo, as her mother Naoko was before her. However, she eventually realizes that Gendo is using her in the same way that he used her mother, and that he cares about Rei more than her, so she likens Rei to that of a romantic rival. In the manga her disdain of Rei is more evident: at one point, during one of Rei's medical checkups, Ritsuko loses control after Rei rebukes her and tries to strangle Rei to death. Realizing that she was acting like her mother before her, she stops herself from killing Rei, but warns Rei against telling anyone what happened. She also destroys the Rei clones in a bid to get at Rei and Gendou.
* ''Manga/SakuraGari'': Sakurako and Katsuragi both try to do something of the sort to Masataka in order to have Souma for themselves. And Sakurako spends a good amount of her time trying to drive away any person that Souma gets involved with [[spoiler: via torturing them into insanity, i.e, she causes a pregnant servant girl to lose the baby of Souma's that she was pregnant with. (Or in the case of the artist Terashima, [[{{Fingore}} breaking his drawing hand]] and then [[DeathByFallingOver pushing him down a flight of stairs]].)]]. And some of the people that Souma took as lovers in the past tried to do this when he tried to get them to leave him alone. [[spoiler:One of them, Yoshino, tried to ''stab'' Souma in the streets, and when refused he was SpurnedIntoSuicide]].
* ''Onii-Chan Control'' features Noa, the little sister to the main character, who revealed she's willing to stab a girl she thought was interested in her brother. Of course, she never shows that side of her whenever her brother is around.
* ''Manga/PandoraHearts'': Gil's devotion to Oz has a pretty dark edge. Hinted early in; outright shown in chapter 33, where Vincent goads him into saying/resolving to kill anyone who hurts or snatches his master away from him - no matter who it is. He almost went through with this concerning Alice. Luckily, he stops himself in time and thankfully, Alice didn't notice a thing.
* Maki in ''Anime/DarkerThanBlack'' has a massive, crazy stalker-crush on his boss, Amber. Such an insane crush, in fact, that he completely abandons the usual Contractor "emotionless" act when he finds the guy Amber's in love with, and tries to kill him even though if he'd succeeded, it would have ruined Amber's entire plan, resulting in a genocide.
* Sayaka Kouno of ''Manga/PrincessPrincess'' once shoved one of Tooru's previous girlfriends down a flight of steps out of jealousy. And then there's her habit of stabbing Tohru's girlfriends with scissors.
* Bonaparta does this in ''Manga/{{Monster}}''.
* ''LightNovel/MirageOfBlaze'': Naoe does this by raping Kagetora's lover and later on forcing Kagetora to possess her to save his life.
* ''LightNovel/AiNoKusabi'' has Guy, who is so in love with Riki, [[spoiler:not only does he give him a penectomy to remove the pet ring that was on his penis]] upon being told that as long as Riki wears Iason's pet ring he'll never be free of him, but he also blows up an entire fortress in an attempt to kill Iason. [[spoiler: It backfires horribly when Iason ''is'' fatally injured, but Riki actually chooses to die with him.]]
* Both Mika and Namie of ''{{LightNovel/Durarara}}'' are {{Yandere}} for Seiji who's pretty crazy himself seeing as how he's [[ALoveToDismember in love with Celty's head]]. Mika has...plans for Celty's real head if she ever gets her hands on it and Namie actually tried to destroy it.
** [[HotForStudent Professor Nasujima]] at Mikado's school clearly has a thing for Anri, which naturally {{Squick}}s the hell out of her. The same guy is also dating Haruna Niekawa (one of his former students). Or was. Haruna doesn't like that he's changed his preferences, so she gave Anri a visit and tried to kill her...
* In the yaoi manga ''Manga/UnderGrandHotel'', in the first few scenes we see Lain Brody in he gives Sen a blowjob, strips him, drugs him and outright molests him as he's drugged (including telling him "No way in hell am I letting Sword Fish kill you. Because he doesn't love you. I'm the only one that can kill you."), rapes him with a ''mop handle'', ties him up and hides him in a dryer. And when Swordfish finds Sen he gives him CPR. Lain responds to this by stabbing Fish in the arm with a fork and tries to stab him again while screaming, "Get off of Sen! He belongs to me!" Immediately after that Lain is shot and killed by security guards.
** Also, Swordfish threatens anyone who expresses an interest in Sen with death, kills the guys who raped Sen saying that he did it for Sen's sake even after Sen told him not to kill them, moves out of Sen's room and lets a rapist move in when angry with Sen, and slices the throat of another one of Sen's rapists right in front of him while saying "I love you, Sen." This being after he tried to get Sen to kill the guy himself but Sen refused.
** And Norman's in love with Swordfish but pretended to be in love with Sen so he could get closer to Swordfish. He tried to persuade Swordfish to kill Sen but that didn't work. So, on one occasion when there was a scuffle going on he tried to get Sen out of the way by stabbing him with a pencil but accidentally ends up stabbing his inmate Walter instead who was trying to protect Sen in the hope of getting protection from Swordfish. When he finds this out, Norman holds a knife to Walter's neck telling him, "If you don't want to die, don't butt in again Walter!"
* ''Manga/HunterXHunter'': [[spoiler:Shaiapouf]] is afraid [[spoiler:Komugi]] might distract the King from his "true goal" and is therefore considering killing her for "the King's sake".
* ''Manga/{{Clover}}'': A thought B seriously got in the way of his romance with C/Ran. He also tried this on Gingetsu, but failed.
* ''Manga/AskDrRin'': Tokiwa tries this over and over for four episodes straight in the hope of having Meirin for himself. [[spoiler:It's eventually revealed he was possessed]].
* ''Manga/{{Basilisk}}'': Kagerou is dead set on killing Oboro so she can have Gennosuke. (Much more in the anime than the manga, though.) Tenzen also wants to kill Gennosuke so he can have Oboro as his puppet wife, which would grant him full control of the Iga Tsubagakure.
* ''Manga/KatekyoHitmanReborn'':
** LethalChef Bianchi goes into a homicidal rage whenever she sees adult Lambo who looks exactly like her deceased ex-boyfriend Romeo, who apparently died of food poisoning. She also has an unrequited crush on Reborn and is perfectly willing to eliminate anybody who has a 'bad influence' on him.
** Earlier on, Haru also had a thing for the [[{{Shotacon}} younger]] [[DevilInPlainSight 'angel-like' version of Reborn]], to the point where she even tried to destroy Tsuna in order to free Reborn from his influence. She later gives up on her crush on Reborn and [[RescueRomance falls for Tsuna after he saves her from drowning]].
** In chapter 271 M.M. threatens to do this to Chrome. Chrome is on her way to deliver something to Mukuro and she encounters M.M. As soon as M.M. glances at Chrome she grabs her and yells at her before hitting her so hard that she falls to the ground, her mouth and nose bleeding. She then keeps calling her an "ugly bitch" and tells her: "The Mukuro-chan of this generation is mine! If you put your nasty little hands on him, I'll kill you!"
* Liang Qi of ''Anime/{{Canaan}}'' appears calm and even-tempered, but is in fact unwavering, merciless, and very much obsessed with admiring and idolizing her Sister" Alphard, to the point of being in love with her. To her frustration, however, Alphard does not reciprocate her feelings and instead ignores or even proceeds to ridicule her from time to time. Because Alphard seems to have taken a special interest in observing Canaan's reactions to every plot carried out by Snake, Liang Qi sees the elimination of Canaan as a way to win back Alphard's attention.
* In ''Anime/XamdLostMemories,'' Furuichi [[spoiler:(in his Xam'd form)]] tries to murder Akiyuki in order to have Haru to himself. [[spoiler:He fails]], and the [[WhamEpisode episode]] ends with [[spoiler:Akiyuki getting LaserGuidedAmnesia after getting confronted by Commander Kakisu, Haru arrested for her relations to the Xam'd incident, and Furuichi beheading myself after finding no reason to live.]]
* In episode 11 of ''LightNovel/GoshuushouSamaNinomiyaKun'' when told Mayu might die soon (she's a succubus so she needs life force) Reika's [[{{Yandere}} alternate personality]] tells Shungo she doesn't care since "it's more convenient for me if Mayu dies like this, because then I can have you all to myself." She then agrees to let Mayu live so long as Shungo "becomes hers forever." This is also played with in regards to Shinobu, a maid of Reika's, who thinks Shungo is not worthy of Reika, and is always trying to "execute" him.
* ''VisualNovel/{{Shuffle}}'': [[{{Yandere}} Kaede]] snaps in episode 19 upon seeing Rin bring home Asa, whom he's dating. She screams at Asa to get out, and viciously attacks her. However, Rin restrains her and she struggles against his hold, screaming at Asa to "DIE!" Primula also discovers Kaede had crossed out Asa's face in some pictures of Rin and Asa together. [[spoiler: She gets better, though.]]
* ''Manga/ElfenLied'': Lucy tries to suppress her instinctive desire to kill all humans so she can live happily with Kouta, until she finds out he lied about the sex of the cousin he was going to a festival with and she saw them hugging, at which point she stops trying to be nice. She then proceeds to slaughter some people at the festival and kills Kouta's father and sister, and starts to go after Kouta's cousin Yuka, voicing her intent to kill her... but only stops once Kohta tackles her and she sees his tear-streaked face. She also isn't above acts of jealousy, once using her vectors to shove Yuka down when she saw her holding hands with him. Yes, she's VERY broken, but how broken she is is absolutely NOT an excuse for her killing or trying to kill innocent people just because Kouta pays more attention to them.
* Gopher of ''Manga/SoulEater'' beats Kid to a bloody pulp twice for having Noah's attention and got extremely pissed off when Maka turned out to have the same uniqueness that made Noah have apparently fleeting interest in Gopher. This gets VERY bad when Noah [[TheCollector decides that he wants to have Maka as well]]. It doesn't get any better. With his chance of killing Maka gone, Gopher beats up Kid some more until realising that while hitting him doesn't achieve anything, showing him something asymmetrical does. He exploits this until Noah turns up and takes Kid away.
* ''Anime/ErgoProxy'': An Entourage Auto Reiv belonging to Re-l Mayer, Iggy contracted the Cogito Virus and grew to become enraged at Re-l's lack of regard for him. He despises Proxies and blames Vincent for taking Re-l - his sole reason for existence - away from him. He develops an unusual state of both loving and hating Re-l, and locks her up to "protect" her, while he attempts to kill Vincent. However, an Auto Reiv belonging to a Proxy that Re-l killed, attempts to kill Re-l at the same time, causing Iggy to return to Re-l. The Auto Reiv goes into a self-detonation mode and destroyed much of Iggy except for part of his head (which left Iggy "conscious" to some extent). In the end, not wanting to see Iggy suffer due to the virus, Re-l shoots him and buries his head.
* ''Manhwa/ThreadsOfTime'': Sali Tayi comes to this conclusion very quickly when he discovers that Atan Hadas likes Moon-Bin.
* ''Anime/{{Paprika}}'': Osanai tries to strangle Konakawa in his dream when the latter tries to take Chiba, whom Osanai loves, away from him.
* ''Manga/KawaiiAkuma'': Naruse basically considers doing this to anyone who tries to get close to Akiyoshi. For example, he once threatened to stab a guy in the eye and later stabbed him in the chest when he found out he was hitting on Akiyoshi. And in another scene he comments to a group of students, "If any of you touch him, I'll kill you all. This guy belongs to me."
* {{Manga/Shiki}} has Megumi who [[spoiler: after turning into a vampire murders her crush's best friend, because she's jealous of how close they are]].
* ''Manga/KarakuridoujiUltimo'': [[{{Yandere}} Rune]], Yamato's lover in a past life reincarnated as a man, threatens to do this to Yamato's crush Sayama if Yamato doesn't do as he says.
* In ''Manga/MahouSenseiNegima'', [[PsychoLesbian Tsukuyomi]] just wants Setsuna to herself and wonders if it's okay to kill her [[BodyguardCrush charge]] and [[SchoolgirlLesbians girlfriend]] Konoka.
* ''Manga/{{Ibitsu}}'': The Strange Lolita's solution to the fact that Kazuki already has a younger sister is to personally make sure that Hikari is taken out of Kazuki's life... permanently.
* ''VisualNovel/{{Tayutama}}'' has a minor case with quasi-{{tsundere}} Ameri, the UnluckyChildhoodFriend of the main character. As Ameri watches Mashiro slowly win Yuuri's heart, she decides (with no small amount of influence from the Dragon) that Yuuri shouldn't have to risk his life with all this magical nonsense. She concludes that the only way to keep Yuuri safe is to drive Mashiro away... with a little help from the villain. In case this you didn't realize this a bad call, she gets bat wings, DullEyesOfUnhappiness, and a dark purple aura.
* This is essentially the main conflict in the second half of ''VisualNovel/DaCapo'', as Sakura tries to stop herself from subconsciously using her magical powers to either kill Nemu or drive her into insanity.
* In the ''Manga/{{Trigun}}'' manga, this turns out to have been over half the point of the entire Gung-Ho Guns plotline. [[TheDragon Legato]] was jealous of [[TheHero Vash]]. Because Knives was preoccupied with ''his twin'', the only person on the planet he didn't intend to kill, and Legato apparently felt that if Knives had no one living to care about, he might find some scrap of affection for his chief minion. And Knives breaks his spine when he finds out.
* Subverted in ''Manga/AirGear''. It ''seemed'' that [[spoiler: Ringo Noyamano had finally snapped on Simca -- enough to attack her with unusual violence to get her out of the way in the "race" for Ikki's love]], but then we find out [[spoiler: she was putting the Migratory Bird out of action ''so she wouldn't hurt or kill herself trying to participate in the war for the Sky Regalia'', due to her lack of combat skills.]]
* ''Anime/TenchiMuyo'' plays it for laughs. Ayeka and Ryoko are involved constantly in this with each other, while their power levels makes it closer to Wile E. Coyote vs. Wile E. Coyote. [[spoiler: In Tenchi Universe it's played more seriously: Ryoko tries to convince Tenchi to abandon a kidnapped Ayeka to Kagato, possibly to invoke the trope, but when Tenchi chooses otherwise she decides to support him anyway.]]
* ''Manga/UruseiYatsura'': Ran's default reaction to anyone who gets within ten feet of Rei.
* In chapter 64 of ''Manga/BlackButler'' [[spoiler: Undertaker attempts to kill Sebastian because he is making Ciel "miserable." He doesn't get a chance to.]] It's also worth noting that Undertaker has a considerable amount of HoYay towards Ciel and tends to lose his personal space around him.
** In episode 17 of the first anime Sebastian has sex with a girl named Matilda to get information. When she finds out, Grell a male to female grim reaper with a crush on Sebastian is shown reacting jealously and writing down the girl's name in a next to die list.
* ''Manga/DNAngel'': In episode 23 Kael to Elliot so that he can have Freedert for himself.
* Mayuri Konishi/Sarashina from ''LightNovel/BookGirl'' has traits of a yandere character. She is crazy about Akutagawa, with whom she went to elementary school. She admits being jealous of Kanomata, who Akutagawa used to protect. When she suspects Akutagawa has feelings for his classmate Nanase Kotobuki, she says: "If so, I'll cut Nanse Kotobuki into ground beef!!!".
* ''Manga/ReimeiNoArcana'': Loki has quite a few elements of {{Yandere}}, from threatening Caesar for insulting Nakaba and regretting that he didn't kill Caesar due to Nakaba's and Caesar's growing closeness in earlier chapters to killing Bella for threatening to have Nakaba either killed or raped by soldiers.
* Nova in ''Magic/MagicKnightRayearth'' wants Hikaru all to herself and won't hesitate to kill her friends in order to eliminate all competition.
* ''Manga/{{Berserk}}'' gives us a non-LoveTriangle scenario between Guts, his [[GoMadFromTheRevelation ill-fated]] lover Casca, and [[EnemyWithin his inner beast.]] After the horrible events of the Eclipse that left Casca insane and incapable of loving Guts, Guts turned to [[PowerOfHate hate]] and [[RoaringRampageOfRevenge revenge]] in [[HeartbrokenBadass his sadness and despair.]] During a two year time span, the dark emotions welling inside of Guts created [[TheHeartless the Beast]], and the {{hellhound}} entity lived in disturbing harmony with Guts, feeding on his hate [[BigBad for the man]] who ruined his life so that one day, [[SuperPoweredEvilSide it may take over Guts' body and soul.]] However, the Beast's plan was interrupted when Guts put his hate and revenge aside [[PowerOfLove for Casca,]] [[DeclarationOfProtection vowing to stay by her side]] and try to [[FindTheCure find a cure for her insanity.]] The Beast does not like this, and has since then tried to get Casca out of the picture by trying to goad Guts into raping and killing her [[TheCorrupter whenever he is mentally or emotionally weak.]] It's important to remember that Casca is also Guts' MoralityChain, since she's the only reason why Guts refuses to give into his dark side.
** Depending on how you interpret their [[FoeYay relationship]], ''Griffith'' may have done this to Casca during the Eclipse to get to Guts. He also looked to be trying to finish them both off before the Skull Knight arrived to save them.
** Griffith's no stranger to this trope even before the Eclipse. It's speculated by Judeau that the mission that he sent Guts on meant to kill Count Julius, who made an attempt on Griffith's life, may have been meant to kill Adonis, his young son (who Guts had accidentally killed during the mission in question) as well, since Adonis was being groomed to marry Princess Charlotte, who Griffith wanted for himself in order to achieve his dream of having a kingdom of his own.
** Also, DarkMagicalGirl Rosine. Platonic or not, she has a very strong obsession with having her MoralityPet Jill stay with her after being separated for so long. Which she demonstrates by telling Guts that Jill is "hers" after realizing that Jill has somewhat of a crush on him. While attempting to kill him.
* ''Manga/DeathNote'':
** Misa once told Light "If I see you with another girl, I'll kill her!"
** There's Kiyomi Takada, who was once Light's girlfriend. She really hates Misa for her involvement in Light's life and has suggested to Light that he should kill her.
** And then when Misa and Takada have dinner together, Misa says that if Takada goes too far, she'll get the death penalty.
* ''LightNovel/AriaTheScarletAmmo'': Shirayuki Hotogi. A perfect Japanese beauty according to Kinji, except for one flaw - jealousy, which turns her into a berserker who assaults any girl approaching Kinji. When she finds out that Aria is living with Kinji she goes as far as trying to murder her. She is shown to love Kinji to the point that she will do anything for him.
* In ''Manga/LovelyComplex'' [[{{Yandere}} Mimi]] has a crush on Otani. She then learns that Otani is dating Koizumi and acts incredibly malicious towards her, including telling her with a SlasherSmile that she will make whatever is left of her life extremely painful if she gets any closer to Otani and trying to stab her hand with a pencil and getting angry when she misses. She later mellows out though more or less.
* Nanami does exactly this to a kitten in ''Anime/RevolutionaryGirlUtena'' when her brother pays more attention to it than her, and ''she'' was the one who got him the kitten for his birthday in the first place. She also knows her brother is interested in Utena and actively tries to kill Utena during a duel with her. Also, when her once follower tries to get close to Touga she hits her and beats up her and her other two followers for going against her and trying to take Touga away from her.
** In one episode, Miki's piano teacher is hinted to have a less than savoury interest in him, and he's inappropriately touchy-feely with him when they talk. [[TwinCest Miki's twin sister Kozue]] has clearly noticed, as it later turns out that she'd previously shoved the teacher down the stairs for it.
* ''Manga/HighschoolOfTheDead'': Takashi believes he may have crossed the MoralEventHorizon after being forced to kill his best friend, Hisashi. Though it was to protect himself and Rei, Takashi admits that it was also partly out of jealousy because Rei had chosen Hisashi over him.
* Manami Anzai from ''Manga/{{Life}}'', who first appears as a [[TheFakeCutie cute and childish]] [[AlphaBitch click leader]] who snaps utterly when she suspects Ayumu is trying to steal away her boyfriend. [[spoiler:She goes so insane that she then dates a gang leader on the side to use him to get back at both Ayumu and her boyfriend, and then promptly screws her boyfriend and the gang leader both over. Not to mention her vow to kill Ayumu with her bare hands]]. Then she [[FromBadToWorse crosses into]] CuteAndPsycho territory.
* ''LightNovel/KaraNoKyoukai'': Lio, who lusts after Shiki, wants to either kill or corrupt Mikiya to remove Shiki's MoralityChain.
* Jagara from ''Anime/WolfsRain'' killed her twin sister [[IllGirl Hamona]] because she was in love with Hamona's husband Lord Darcia. Darcia did not appreciate Jagara's attempt to "free" him from the responsibility of caring for his comatose wife.
* In ''Manga/WolfGuyWolfenCrest'' Haguro (who's {{Yandere}} for Inugami's werewolf form) does NOT take it well when Chiba briefly meets up with Inugami. [[NoHoldsBarredBeatdown At]] all.
** Possibly Ryuuko Konuma's motivation for [[spoiler:selling out Aoshika to Haguro]] beside, you know, avoiding [[WouldHitAGirl ANOTHER]] [[NoHoldsBarredBeatdown beating.]] Heaven help [[spoiler:Aoshika.]]
*** [[spoiler:Given the eighteen chapter gang rape, heaven's a little late.]]
** After THAT, Haguro also tries to kill Aoshika while telling her that Inugami is too good for her. Fortunately, Inugami [[BigDamnHeroes shows up in time]].
* Honne-Onna of ''Anime/HellGirl'' has [[EvenTheGirlsWantHer diehard fangirls]]. One was ready to send someone to hell because she thought he was dating her. [[spoiler: And another ''actually sent'' the other girl to hell because she thought she got too close to Onna.]]
* Hiromasa of ''Manga/LovePistols'' considers doing this in regards to anyone who expresses interest in Shima.
* ''Warau Hyouteki'' aka ''Manga/TheLaughingTarget'': When Azusa and Yuzura were mere children, they were betrothed to each other by their parents. Many years later, after Azusa's mother mysteriously dies, Azusa returns to Yuzura with the intent of marrying him; Yuzura has a girlfriend, Satomi, and this doesn't sit to well with Azusia. Add to the fact that Azusa is anything but "normal", and she has no problem eliminating the competition by any means possible.
* In ''LightNovel/FateZero'', Kariya Matou plans to do this with Tokiomi (the husband of his unrequited love Aoi). It's not purely for this reason, since Kariya blames him for handing him and Aoi's daughter Sakura over to the Matou's tortures (Though neither Aoi nor Tokiomi ''actually'' know what she'll be put through -- the Matou leader, Zouken, is ''that'' much of a BitchInSheepsClothing). [[spoiler: Unfortunately, Kotomine kills Tokiomi first, but he sets Kariya up so Aoi (who actually ''does'' love Tokiomi) is led to believe Kariya ''did'' do it, and things get... messy.]]
* PlayedForLaughs in episode 5 of ''LightNovel/ThePetGirlOfSakurasou'', Sorata and Mashiro have a talk after Nanami agrees to move into [[QuirkyHousehold Sakura Hall]]. OnlySaneMan Sorata's plan it to bribe Mashiro with food with a promise that she would take care of herself. Jin {{the Casanova}} suggests they tell Nanami they're dating, which Sorata immediately rejects. InnocentlyInsensitive IdiotSavant Mashiro then innocently invokes this trope by stating that [[{{Yandere}} she should kill]] Nanami to keep their secret safe, which he also immediately dismisses. Sorata decides to try his idea, which he calls Plan A, calls Jin's idea Plan B, and Mashiro suggests her idea is Plan C, causing Jin to start laughing wildly at Sorata.
* In ''LightNovel/LoveChunibyoAndOtherDelusions'', [[spoiler:Satone Kidnaps Rikka and makes Yuuta play a game with her where they have to break up if she wins.]]
* In ''Manga/TokyoGhoul[=:Re=]'', Kanae Von Rosewald is intensely jealous of his master's interest in Sasaki, initially lying and keeping secrets so that Tsukiyama won't learn about him. He makes one failed attempt on Sasaki's life, before being forced to reveal the truth to Tsukiyama. When Tsukiyama asks him to buy some time, because the Quinx keep getting in the way of a private conversation.....Kanae hires several members of Aogiri to help him try to ''kill'' them. Afterwards, [[BigBad Eto]] corners him and forces him to realize that what he ''really'' wants is to have Tsukiyama completely under his control and make Sasaki suffer as much as possible before killing him. Things quickly escalate from there, and he seems genuinely convinced if he can just murder his rival, he'll win the heart of his beloved master. Their rooftop battle is a carnage-filled NoHoldsBarredBeatdown, with Kanae screaming that he's finally going to be loved. [[spoiler: Instead, [[SweetPollyOliver she]] ends up making a DyingDeclarationOfLove before sacrificing her life to save Tsukiyama and dies content]].
** Mutsuki seems to have inclinations towards this as revealed in chapter 114 as we see him think of the word "die" in regards to Touka when he thinks about Touka and Sasaki sharing an intimate moment before he admits he has feelings for Sasaki. It's theorized the reason he tells Aura that they should kill Sasaki together is because he knows Aura has murderous inclinations towards Sasaki and seeks to protect Sasaki from Aura or so he can kill him himself so he is manipulating Aura for this purpose. His intentions towards Touka are further enforced when he asks Takeomi if he can borrow a picture of her.
** In the first manga Tsukiyama is obsessed with and wants to eat Kaneki so he goes into a rage when he sees Touka take a bite out of Kaneki's shoulder and tries to kill her. He even tries to kill Kaneki himself when the latter tries to go off on a dangerous rescue mission and tells him he won't allow anyone, not even Kaneki himself, to get in the way of his eating Kaneki.
* ''Anime/YuriKumaArashi'': Mitsuko kills/eats Sumika, Kureha's girlfriend, purely because she desires Kureha.
* ''Anime/MawaruPenguindrum'': It's implied that Tsubasa stabbed Tabuki out of jealousy once Yuri broke off their affair.
* [[{{Yandere}} Kei]] of ''Manga/DrugAndDrop'' has obsessive feelings for Kazahaya, to the point of warning him that she would kill anybody who got in the way.
* ''Manga/{{Naruto}}'':
** In the [[{{Filler}} sixth Shippuden movie]], ''Anime/NarutoTheMovieRoadToNinja'', Hinata's alternate counterpart threatens to kill Sakura if she gets close to Naruto.
** In the [[{{Canon}} seventh Shippuden movie]], ''Anime/TheLastNarutoTheMovie'', [[BigBad Toneri]] attempts to do this to Naruto because he's his rival for Hinata's love.
* ''Manga/AxisPowersHetalia'':
** In one drama cd Belarus, already {{Yandere}} for her brother, is implied to be attempting to strangle a cat in one scene because it got in the way of her and Russia. She also does such things like scare people away who Russia is trying to get close to and once breaks Lithuania's fingers because she's angry he has Russia's attention.
** Russia considers doing this to America because [[IJustWantToHaveFriends he really wants to have friends]] and America keeps making friends with the people Russia wants to make friends with thus he's getting in his way.
* The grotesque huge [[DepravedHomosexual Captain Continental]] lusts after Jonathan in ''Anime/LegendOfTheBlueWolves''. However, Jonathan rejects his amorous advances in favor of his growing feelings for Leonard. Captain Continental notices their growing closeness and does everything he can to separate them, including calling Jonathan to his office alone so he can try to make him sexually submit to him, and rushing at Leonard with the intent to beat him after he tries to stop Captain Continental from beating up Jonathan and trying to make him submit to him. He later attempts to have Leonard locked into solitary confinement in order to get him out of the way after framing Jonathan for being a spy. He and his subordinate then approach Jonathan before beating him and gang raping him.
* ''Manga/DGrayMan'': Komui is implied to be [[BrotherSisterIncest in love with his sister Lenalee]] and [[CrazyJealousGuy goes nuts if there's even a hint of a guy being interested in her]]. In fact, a way to wake him up is to say "Lenalee's getting married." In the novel, when Bak (who also has feelings for her) gives Komui a tea that makes one tell the truth he has a breakdown when Bak asks Komui "Isn't Lenalee free to love who she wants?" He takes this to mean that Lenalee is in love with a guy and immediately pulls out a machine gun saying "Then I'll kill everyone and then die!"

[[folder:Audio Play]]
* This almost always happens in ''AudioPlay/YandereNoOnnaNoKo'' with the selected girl killing someone she considers a threat to her relationship with the protagonist. The only time this doesn't really happen is in Sakuya's track who just sends two girls away when they come looking for the protagonist.
* Just about every guy in ''AudioPlay/YandereHeaven'' consider doing this to their rival under the belief that getting rid of the other guy will ensure that the protagonist will love him.

* In the Literature/{{Child Ballad|s}} ''Literature/FauseFoodrage'', some variants have this as the motive to kill the king.

[[folder:Comic Books]]
* In ''ComicBook/IKilledAdolfHitler'' the main character follows his former girlfriend's new date, and even pulls out a gun, but decides against it.
* During the "Return of the King" storyline in ''ComicBook/UltimateXMen'', after Cyclops goes missing on a mission to the Savage Land with Wolverine, rumors start floating around that Wolverine killed Cyclops so he could be with Jean Grey. But it turns out that [[spoiler:the rumors are, in fact, ''completely true''. This comes as a special surprise if you're used to the main universe's Wolverine, who goes by samurai honor codes and such.]]
** And later [[spoiler:it turns out that Scott ''[[NotQuiteDead survived]]''. [[HesBack And then he came back to the X-Men]]. Wolverine was majorly screwed ''[[HumiliationConga and not in a good way]]'', since Jean was utterly ''pissed off'' at that. Cyclops was also pissed. Their battle consisted of Cyclops blasting ''all of Wolverine's skin off''.]]
* Strange example: ComicBook/{{Thanos}} cursed SelfDemonstrating/{{Deadpool}} [[CursedWithAwesome with immortality]]. The catch? Thanos's love interest, Death, is herself in love with Deadpool and the feeling is mutual. By keeping Deadpool alive indefinitely, he won't be able to cockblock Thanos.
* One Creator/ECComics story had two stories in one involving the same characters: ''Murder the Lover'' and ''Murder the Husband''. In the first, the husband finds out his best friend is having an affair with his wife, and invites the friend up to his forest cabin with murder on his mind. In the second, the husband is ignorant of the affair, and the friend takes advantage of an innocent invitation up to the forest cabin to get the wife for himself once and for all. As predictable in EC comics, neither plot ends well for the perpetrator.
** They used this again as part of the setup for the climax in "The Thing From The Grave." Once again, it definitely doesn't end well for the perpetrator, who comes to a very gruesome and unpleasant end.
* A recent indie comic, ''The Two Sides of Jack'', has a subversion. The plot is Jack's girlfriend has been cheating on him, but her new lover is now a zombie. After going through a massacre (Finding that it's not easy when you're overweight) he eventually manages to complete his mission. He then [[spoiler: cuts off the guy's dick and sticks in his girl's mouth, telling her "Fuck off and die bitch."]] Quite a memorable ending, and squicky at that.
* One time, SelfDemonstrating/TheJoker messes with a rehabilitative Two-Face, suggesting that his girlfriend and best friend [[Franchise/{{Batman}} Bruce Wayne]] are playing behind his back and want to keep him locked up in Arkham. To give a further push, Joker has one of his minions make a fake newspaper article that Bruce and Two-Face's girlfriend are going to marry and slips it to an already suspicious Two-Face, who now loses it, escapes from Arkham, kidnaps his girlfriend and tries to kill Bruce, fulfilling this trope himself.
** Also ComicBook/TwoFace's brilliant idea of trying to kill [[ComicBook/GothamCentral Renée Montoya's]] girlfriend - [[SarcasmMode because that cures lesbianism]].
* Loki does this to an Asgardian named Theoric, then subsequently disguises himself as him so that he can marry his fiancee Sigyn.
* Not a love interest but a pet. When they were little Cheryl's brother in ''ComicBook/AfterlifeWithArchie'' killed her puppy because she appeared to love her more than him.

[[folder:Fan Works]]
* This happens in ''FanFic/DecksFallEveryoneDies'', making Duke Devlin come close to being RonTheDeathEater.
* ''Fanfic/ThousandShinji'': Zigzagged. When [[BelligerentSexualTension Shinji and Asuka]] [[RelationshipUpgrade got together]] Rei got extremely jealous. At the beginning she [[IWantMyBelovedtoBeHappy told herself that Asuka made Shinji happy and that was all that mattered]]. However she resented Asuka and often dreamt with killing her... and then she dreamt with Shinji killing her to avenge Asuka or killing himself, so she restrained herself. Paradoxically she also felt attracted to Asuka. She attempted [[spoiler:getting a threesome with both, but due to her clumsy methods, Asuka (who had previously considered her a friend) thought she was trying to steal Shinji and killed her]]... but since Rei had several spare bodies she merely occuppied another. Finally, Shinji ended that conflict by talking them into a threesome.
* This is the premise of many fanfics, in that one character attempts to kill a second to get possession of their love interest. What usually follows from this is that the third character rides to the rescue of the second and fluffy romance and/or sex ensues.
* Hikaru does this in the ''infamous'' ''Manga/KimagureOrangeRoad'' RevengeFic ''Fanfic/RevengeRoad'', but gives the hypotenuse, Madoka, a relatively merciful death by being shot in the head, noting that even if she stole Kyosuke away from her, she was her friend for a long time. Kyosuke, however, is killed in [[FamilyUnfriendlyDeath a far more brutal manner]], being tortured to death with knives.
* In the Creator/HansVonHozel story ''Valentine's Day'', [[Literature/HarryPotter Harry]] sets a dragon on Ron so he can have Hermione for himself.
* In ''Fanfic/WhiteDevilOfTheMoon'', [[Manga/SailorMoon Queen Beryl]] tries to kill [[LyricalNanoha Nanoha]], who in this continuity is the reincarnation of Princess Serenity and her rival for Prince Endymion's affection. However, it's possible that Nanoha may not even be a hypotenuse, as WordOfGod has it that she does not necessarily have to fall in love with Mamoru despite them both being in love in a past life, and one omake [[spoiler:[[CrowningMomentOfFunny has Nanoha ending the war by declaring that she loves Fate instead]].]]
** Indeed, in the canon story [[spoiler: Nanoha and Fate get together, but Beryl refuses to believe it when told by Nanoha's sister and tries anyway.]]
* This is one of the ways Ember had been turned into RonTheDeathEater in the ''Franchise/SpyroTheDragon'' fandom, with Cynder being the hypotenuse. Note they're not even in the same universes.
* ''FanFic/InnerDemons'': [[FaceHeelTurn Twilight Sparkle]] tries to kill Cadence in a jealous rage when Shining Armor rejects her [[VillainousIncest advances]] but is stopped in time by the other Element bearers.
* In another MLP story called ''Split Love'', Pinkie sees Applejack and Rainbow Dash kissing and decides to kill AJ out of jealousy.
* In the ''Series/LostGirl'' fic [[http://www.fanfiction.net/s/7987292/1/Faethful Faethful]] the [[BigBad Garuda]] encourages Dyson to murder Lauren, and clear the way to Bo. He refuses, but Lauren is understandably rattled.
** Unfortunately, this leads to consequences in the sequel. The combination of him having his love returned and the Garuda's challenge causes him to undergo a wolf Fae right-of-passage (albeit an extremely perverse version). He spends the sequel trying to show his "[[AttemptedRape dominace]]" over Lauren to demonstrate he is Bo's true lover. [[spoiler:He very nearly succeeds ''twice'', before Bo beats it out of him]].
* ''FanFic/{{Hivefled}}''; The Condesce became jealous of her moirail's flushcrush and told him she was unfaithful. The moirail in question being the Grand Highblood, [[IfICantHaveYou he responded violently]]. [[ILoveTheDead This helped Condesce to a fairly limited degree.]]
* In the ''Fanfic/EmpathTheLuckiestSmurf'' story "Empath The Wartmonger", Princess Chamelianne threatens [[FedToTheBeast to feed Smurfette to a pack of hungry baby crocodiles unless Empath gives himself entirely to her]].
* In the Digimon fan fiction ''FanFic/Zero2ARevision'' Davis, still upset and jealous of TK because he sees him and Kari hug each other believing that Kari prefers TK more than him, attempts to leave TK to his death in the Emperor's first base underwater; a base that not only is about to explode, but also infested with 3 Franchise/{{Terminator}} units and an [[Franchise/{{Alien}} Alienmon]] just so that he could have Kari all by himself. Fortunately, Shaun sees through this and [[WhatTheHellHero harshly called him out on this]], causing Davis to realize his mistake and returns back to save TK from the enemies.
* Upon returning to Gongmen City after thirty years of banishment in ''FanFic/TheVow'', one of [[WesternANimation/KungFuPanda2 Lord Shen's]] first lines of business is killing off [[UpperClassTwit Lord Juan]] who's engaged to Lianne.
* Twilight in ''WebVideo/FriendshipIsWitchcraft'' is jealous of her ([[NotBloodSiblings adopted]]) brothers fiancee. She doesn't murder her herself but Twilight leaves her to die [[spoiler:then marries a brainwashed Francis]]. Candence has a BackupTwin named Candance though.
* In ''SharedStrength'', after finding out that Sinon and Kirito are inside Sword Art Online [[spoiler:Eterne]] tries to get Sinon killed via the hands of Laughing Coffin, [[spoiler: twice]].
* In the ''WesternAnimation/KimPossible'' fic [[https://www.fanfiction.net/s/2727998/1/Frequency-of-Evil "Frequency of Evil"]], Shego, having become attracted to Ron, briefly considers killing Kim but decides that would only enrage Ron. In the next story in the series, [[https://www.fanfiction.net/s/2761350/1/Trio "Trio"]], she decides on a different, and ultmately more successful approach; seduce Kim and convince her of the benefits of [[OneTrueThreesome a threesome with Ron.]]

[[folder:Films -- Animated]]
* Gaston in ''Disney/BeautyAndTheBeast''. "BELLE IS '''MINE!!!'''"
* ''WesternAnimation/TheBookOfLife'' features a rare example of an outside party doing the murdering. When it looks like Xibalba is going to lose TheBet, he has Manolo killed via snake bite. While it technically works, it turns out to be far from the last word on the subject.
* In ''Disney/{{Tangled}}'', just because her love for Rapunzel is non-existent or at best a warped and possessive thing doesn't mean that Mother Gothel can't resent and stab Flynn mortally because he and Rapunzel love each other, and his actions resulted in Rapunzel realizing she doesn't love Mother Gothel.

[[folder:Films -- Live-Action]]
* ''Film/{{Orphan}}'': All of [[spoiler:Esther]]'s actions in this film have in mind the ultimate death of [[spoiler:Kate, Danny AND Maxine]] so that she can have [[spoiler: John]] all to herself.
* In ''Film/BatmanAndRobin'', Poison Ivy deactivates Mr. Freeze's IllGirl wife Nora from her life support system and blames it on the heroes - and in the process, she's able to convince him to take revenge on all of humanity by freezing the world and leaving her and him as the ''only'' people alive. [[spoiler:Freeze learns, once his plan is undone, that the good guys actually saved his wife and that Ivy was the one who tried to kill her, prompting a HeelFaceTurn]]. Clearly she is seriously into him.
* Caledon Hockely in ''Film/{{Titanic 1997}}'' comes to this conclusion when he finds out that his fiance Rose loves Jack more than she loves him.
* David Allen Griffin from ''Film/TheWatcher'' does this with all of Joel's love interests. He wants to make sure that Joel [[FoeYay only thinks about and chases after]] ''[[FoeYay him]]'', and any woman getting in the way is just [[{{Yandere}} asking for death]].
* In the 1986 version of ''Film/TheHitcher'', John Ryder does this to Jim Halsey's [[OfficialCouple female love interest]]. Apparently, not only is he [[StalkerWithACrush obsessed with stalking Halsey]] and having FoeYay with him, he also wants to make sure that Halsey doesn't have a girl by his side.
* [[TheChessmaster Lady Kaede]] in ''Film/{{Ran}}'', as part of her scheme to [[spoiler:bring down the House of Ichimonji, manipulates Jiro to murder his wife, Lady Sue.]]
* In ''Film/TheCrush'', Adrian loves Nick so much she's willing to kill his girlfriend and her own friend to get him. Luckily, she doesn't succeed.
* Debbie of ''Devil In The Flesh'' does this when she kills numerous people she thinks might try to prevent her from being in a possible relationship with her teacher, including her grandmother. She also kills her friend and tries to kill her teacher's wife as well.
** In ''Devil In The Flesh 2'' Debbie escapes from the mental institution she was sent off to in the first installment of the series. After the young co-ed dies in an unexpected accident, Debbie steals both the girl's identity and her car, and heads off to the college her victim was supposed to attend. There, Debbie quickly develops a psychotic crush on her dashing writing professor, Dr. Sam Decker, killing anyone she perceives as a threat to their relationship. However, Debbie's scheme starts to fall apart when her roommate begins unraveling Debbie's lies and discovers the truth about her past. Knowing that she is in danger of being exposed, Debbie makes plans to get rid of her roommate and her friends by any means necessary.
* In ''Film/MoulinRouge'', The Duke threatens to do this in order to blackmail Satine.
--> ''The Duke:'' Tell her that the show ''will'' end my way and she will come to me when the curtain falls... or I'll have the boy killed.
--> ''Zidler:'' ...Killed?
--> ''The Duke:'' .... (nods to his [[BattleButler man-servant]] and [[PsychoticSmirk smirks]]) Killed.
* ''Franchise/ThePhantomOfTheOpera''
** In [[Film/ThePhantomOfTheOpera1925 the 1925 film]], The Phantom forces Christine to choose between two levers: one which will save Inspector Ledoux and her lover Raoul and one which will blow up the Opera. Christine of course chooses that lever that will save the two men, but it's a trick, of course. It will "save" the men from being blown up by drowning them. Christine [[PleaseIWillDoAnything begs the Phantom to spare them, promising him anything]], and, in the end, The Phantom is unable to go through with it and opens a trap door that releases the water JustInTime.
** Done again, of course, in [[Film/ThePhantomOfTheOpera2004 the 2004 adaptation]] of Andrew Lloyd Webber's musical. This time The Phantom [[ScarpiaUltimatum threatens to strangle Raoul if Christine refuses to submit to him]].
* Attempted with extremely little forethought by Noah in ''Film/TheVillage'' when he learns that Ivy and Lucius are engaged. Naturally, not being possessed of full mental faculties, he sort of overlooks the "make it look like an accident and, with Lucius out of the picture, win Ivy over" part, but he does the "stab Lucius over and over again" part quite well.
* In ''Film/{{Scarface 1983}}'', Tony Montana murders his best friend Manny Ribera, believing that he slept with his sister, Gina, for whom he harbors secret desires himself. However, she reveals that she and Manny are married.
* There is an interesting take on this trope in the opening scene in ''Film/Saw3D''. A woman has been involved with two men, neither of which know about the other. All three of them are put in a Jigsaw trap where one of the three will die. The two men are forced to either kill the other man, or, together, kill the woman. The message that plays before the "game" begins even states that "one of the sides will drop out of this love triangle". [[spoiler:Ultimately this trope is averted since neither of the guys (hypotenuses) are killed, and instead the guys decide that the woman should die.]]
* ''Film/TheHouseOfYes'' inverts this. [[spoiler:Jackie, the AxCrazy lover of the main character kills him instead and lets the hypotenuse run away.]]
* Hedy (Jennifer Jason Leigh) is sort of a LesYay version of a {{Yandere}} towards Allie (Bridget Fonda) in ''Film/SingleWhiteFemale''. She kills Allie's boyfriend.
* ''Film/{{Deathwatch 1966}}'': Petty thief Lefranc competes with his cellmate, Maurice, for the attentions of the murderer Greeneyes. Greeneyes, unaware of either man's infatuation, constantly switches his favor from one to the other, further escalating the hatred between the two. In the end, [[spoiler: Lefranc strangles Maurice to death.]]
* Alex of ''Film/FatalAttraction'' attempts this near the end.
* In ''Film/TheHauntedMansion'': Gracey pulls a sword on Jim and threateningly approaches him when Jim (Sara's husband) comes to rescue Sara from Gracey and Sara's wedding. But Jim pulls out a letter from Gracey's dead lover and Gracey backs off.
* Madison turns it UpToEleven with her crush on Ben in the 2002 movie ''Film/{{Swimfan}}'', killing two police officers and nearly killing Ben's girlfriend before she's finally stopped.
* In 1996 ''Film/{{Fear}}'' David is one hell of a {{Yandere}} towards his girlfriend Nicole. He quickly shows his true colors when he beats a friend of hers to death simply for walking with her and then goes totally ballistic after she tries to break up with him. He even tried to break into her house and kill her family and [[MoralEventHorizon beheaded her dog]].
* In the French film ''Film/HighTension'', this trope is exemplified in [[spoiler:the protagonist, Marie, who creates an alternate personality to brutally murder the family of her [[PsychoLesbian lesbian crush]], Alex... simply so that she could have her all to herself.]]
* ''Film/LostHighway''. Mr Eddy: ''Her name is Alice. I swear I love that girl to death. If I ever found out someone was making out with her. I'd take this'' - pulls out a pistol - ''and shove it so far up his ass it would come out his mouth. Then you know what I'd do? I'd blow his fuckin' brains out.''
** Notably, Mr. Eddy ''himself'' becomes the victim of another case of MurderTheHypotenuse in the end.
* The jack in the box in the Steadfast Soldier sequence of the ''Disney/{{Fantasia}}'' movie tries to kill the titular soldier because the ballerina loves the soldier and not him. Luckily, he doesn't succeed.
* ''Film/PlayMistyForMe'': Dave (Eastwood) is a womanizing DJ who constantly gets calls from a woman asking him to play the song "Misty". He eventually meets the woman, named Evelyn, and has a one-night-stand with her. Evelyn insists on making herself part of Dave's life and, at first, Dave likes the attention. However, his ex-girlfriend, Tobie, moves back to town and Dave decides to patch things up. After he attempts to tell Evelyn that he's not interested, she responds by attempting suicide. Dave and Tobie get closer, but Evelyn isn't going to take it and tries any way she can to keep Dave to herself, even if it means getting rid of Tobie for good...
* ''Film/DarkShadows'': Angelique hypnotises Josette and forces her to fall off the cliffs.
* The FlyingBrick title character of ''Film/MySuperExGirlfriend'' (Uma Thurman) vows to destroy the protagonist's life after he breaks up with her. One memorable scene had her throw a shark into the bedroom of his new girlfriend after spending the night with her.
* In ''Film/{{Sunrise}}'', a farmer and his mistress plot to drown his wife and [[MakeItLookLikeAnAccident make it look like an accident]]. The plan is averted at the last moment.
* In ''Film/BackToTheFuturePartII'', [[CorruptCorporateExecutive the Biff Tannen]] of the alternate 1985 murdered George [=McFly=] in 1973 and married Lorraine shortly afterwards, [[ScrewTheRulesIHaveMoney paying Hill Valley police to look the other way]].
* In ''Film/WeddingCrashers'' [[CrazyJealousGuy Sack]] catches John trying to sneak into his and Claire's engagement party and has his buddies beat him up. He then threatens to kill John if he ever comes near Claire again. When John shows up to their wedding Sack looses it and tries to attack him.
* ''Film/SilverLiningsPlaybook'': Pat want to reconcile with his estranged wife, Nikki (Brea Bee). She has moved away and obtained a restraining order against him after Pat had found her in the shower with another man and responded by nearly beating him to death.
* The protagonist of the 1933 film ''Parole Girl'' is falsely accused of robbery and sent to prison While in prison she befriends a woman who at least attempted this once.
-->"(...) I once worked with a girl who went for my guy. Aw gee, that's a shame what happened to her."\\
"What happened to her?"\\
"Well, a milk bottle fell on her from the second story, and a St. Louis cop tried to tried to say my fingerprints were on the bottle. Can you imagine that? "Why that dumb cop, my fingerprints weren't on that bottle."\\
"I wore gloves."
* In ''Film/{{Batman}}'', an attempt at this is part of the origin of Comicbook/TheJoker. Mob enforcer Jack Napier is seeing [[TheDon mob boss]] Carl Grissom's girl, so Grissom arranges for him to be killed. He sends Jack on a job then tips off the police, with [[DirtyCop Eckhardt]] giving the cops under him orders to shoot to kill. During the shootout, Jack ends up falling into some chemicals, becoming the Joker.
* ''{{Film/She|1965}}'': After Ustane starts a relationship with Leo, whom Ayesha wants for herself, Ayesha has her executed.
* In ''Film/DeadlyBlessing'', it is revealed that [[spoiler:the killer is the daughter from the farm next door, who is killing anyone near the main character Martha because she is obssessed with her, and wants Martha to be hers alone]].

* A Jewish man is on trial for threatening his wife's lover with a gun after catching them in bed.
--> '''Judge:''' Defendant, you said that an unwritten law would would have allowed you to get away with shooting your wife's lover, so why didn't you?
--> '''Defendant:''' Your honor, as I was aiming my gun at him, he looked at me and asked how much I wanted for the gun. After that, how could I kill a fellow businessman?

* In Victor Hugo's ''Literature/{{The Hunchback of Notre Dame}}'', Archdeacon Claude Frollo attempts to stab Captain Phoebus to death when he sees him kissing Esmeralda, the gypsy girl whom Frollo is madly in love with. Phoebus survives, and Esmeralda is arrested on accusations of witchcraft and murder. Frollo uses this as an oppertunity to confess his love to Esmeralda and tells her he killed him out of love for her. Esmeralda, understandably, is less than impressed and refuses to go along with him.
* ''Literature/TheWheelOfTime'': This is Lanfear's dating philosophy.
* The story of King David and Bathsheba in Literature/TheBible (2 Samuel 10-12), where the king [[TheUriahGambit sends a general named Uriah on a suicide mission]] because he fancies Uriah's wife, makes this OlderThanFeudalism.
** He paid for it. Oh, did he pay for it. [[spoiler:When God actually calls you out and then the first child you have with your now-wife dies... Then your daughter gets raped by her brother (though according to Jewish law they weren't actually related...whatever). Then another son kills that son and rebels against you...and so on]].
* Creator/AgathaChristie:
** ''Sparkling Cyanide'': The initial murder is committed by [[spoiler:the victim's husband's secretary, who is in love with the husband and believes he would turn to her if the wife was out of the way. He doesn't, so in order for her murder to not be in vain, she engineers a convoluted series of follow-up murders designed to eventually give her control of the family fortune.]] It was almost successful; it's strongly implied that [[spoiler:the husband and the secretary]] would have gotten together eventually (with even the victim's relatives commenting on what a good couple they would make) except [[spoiler:he accidentally drinks poison that was intended for his sister-in-law.]]
** In ''[[spoiler:Literature/AndThenThereWereNone]]'', [[spoiler:Vera Claythorne]] kills [[spoiler:little Cyril]] not because he's her love rival, but because [[spoiler:he was the heir of his family's wealth, which prevented Vera from marrying Cyril's uncle Hugo.]] Backfired horribly because [[spoiler:Cyril actually was [[LikeASonToMe like a son to his uncle]], so after Vera got a KarmaHoudini out of the deal, he crossed the DespairEventHorizon and broke off their engagement, becoming TheAlcoholic.]]
*** Also invoked by [[spoiler:General [=Mc Arthur=]]] when he [[spoiler:sends his NumberTwo [[TheUriahGambit in a lethal mission]] because he was the lover of [[MayDecemberRomance his much younger]] wife, Leslie. Poor Leslie [[DeathByDespair died of double pneumonia]] few years later.]]
* The Literature/SherlockHolmes story ''The Crooked Man'' features a military officer who betrays an underling to the enemy so he can steal his girl. Unlike the David and Bathsheba legend (which the story references), the underling survives (despite ColdBloodedTorture from the enemy). His condition is such that he avoids his old love out of [[DontYouDarePityMe fear of pitying]] him, but he comes back eventually, his love recognizes him, and the false husband dies of stroke on learning of it.
* Inverted at the end of Creator/CharlesDickens' ''Literature/ATaleOfTwoCities'' when Carton [[spoiler:removes himself from the love triangle with Lucie by taking Darnay's place under the guillotine.]]
* The major subplot of Creator/LoisMcMasterBujold's ''Literature/ACivilCampaign'' featured Miles Vorkosigan [[MaliciousSlander being accused by political opponents]] of doing exactly this during the events of the previous book, ''Literature/{{Komarr}}'', in order to free up the woman he was now attempting to court. The truth being part of an ultra-classified incident that couldn't even be revealed to some of the highest levels of government (if the bereaved hadn't been a direct witness, ''she'' wouldn't even have known), so things got rather... complicated.
* Instead of getting killed, Edmond Dantes, a.k.a. [[spoiler:''Film/TheCountOfMonteCristo'']] gets sent to the hellish prison named Chateau d'If, all thanks to a conspiracy mostly engineered by his "best friend" Fernand so he can have Mercedes, Dantes' fiancee.
** That's the [[TheMovie film adaptation]] with Jim Caviziel. In the [[Literature/TheCountOfMonteCristo original book]] Fernand is barely even an acquaintance of Edmond. Fernand ''is'' in on the plot and does ''not'' hesitate to take advantage.
* In ''Literature/TheBrothersKaramazov'', [[spoiler:Smerdyakov]] thinks this will be the natural result of baiting Dmitri with a BriefcaseFullOfMoney in the lair of his romantic rival.
* In the Creator/BenBova novel ''Mercury'', the story starts with Mance Bracknell, lead engineer on a space elevator, married to Lara Tierney. Victor Molina, astro-biologist best friend of Mance, wants Lara. When the space elevator collapses, killing hundreds of millions of people and devastating many nations, [[spoiler:Victor falsely testifies in court that Mance was negligently responsible for the collapse, getting him put into forced labour for life. After an accident wipes out everyone on a spaceship but him, Mance takes on the identity of one of the crewmembers and (eventually) gets a job as manager of a colony on Mercury. He lures Victor (who is now happily married to Lara) to Mercury with some life-bearing rocks he's planted, with the goal of getting Victor publicly humiliated when his astro-biologist peers inevitably discover that the rocks aren't from Mercury (thus showing him as either a fraud or an idiot, either way ending his career). Mance seems to think this will get Lara back, but when he reveals his identity, plan, and Victor's false testimony, Lara rejects them both]]. Smart woman.
* In the first book of ''The Binding of the Blade'' series by L.B. Graham, there is a LoveTriangle between [[TheHero Joraiem Andira]], [[JerkAss Rulalin Tarasir]], and [[TheChick Wylla Someris]]. Rulalin was Wylla's UnluckyChildhoodFriend, and hadn't seen her for a few years prior to the beginning of the book. He had been hoping to convince her to marry him because when he had first confessed his feelings for her she had been in the midst of grieving her dead father. Naturally, he wasn't happy [[LoveMakesYouCrazy at all]] when she continued to reject his advances and instead chose to marry Joraiem. About a month after their wedding, Rulalin [[spoiler:lured Joraiem down to a remote spot and tried to convince Joraiem to murder him because life had no meaning if he couldn't marry Wylla. Joraiem, shocked, refused, so [[LoveMakesYouEvil Rulalin stabbed him instead]]. [[HerHeartWillGoOn Fortunately, that wasn't the end of the Andira bloodline...]]]]
* In Creator/DanBrown's ''Literature/DigitalFortress'', Susan Fletcher's boss Trevor Strathmore is in love with her and attempts to [[spoiler:have her boyfriend killed]] to win her over. This backfires massively when [[spoiler:she comes across his pager showing the hitman's report]].
* In Creator/EdgarRiceBurroughs's ''[[Literature/JohnCarterOfMars Princess of Mars]]'', after Dejah Thoris believed John Carter died and promised to marry a foreign prince, she explains that they have laws to prevent this trope: she can not marry the man who killed her fiance. He carefully arranges that someone else kill him in their attack.
** In ''Thuvia, Maid of Mars'', Carthoris sees that a beleaguered ship is that of Kulan Tith, betrothed to the woman he loves, and is tempted to sail on, leaving him to his death. He doesn't, of course, even though Kulan Tith himself comments on the HeroicSacrifice entailed.
** In ''The Master Mind of Mars'', when Ulysses Paxton revives Dar Tarus from FauxDeath and proposes his man against Xaxa, Dar Tarus is eager: he reveals that, in the BackStory, Xaxa had sent him to this FauxDeath so her favorite could woo the girl who loved him.
* Geoffrey Clifton in ''Literature/TheEnglishPatient'', when he finds out about the title character's affair with his wife, tries to kill him. [[IfICantHaveYou And the wife.]] And himself. So it's really more "murder the hypoteneuse and the legs".
* Victoria in Charlotte Dacre's Gothic novel ''Zofloya; or, The Moor'' poisons her husband to free herself to pursue his brother Henriquez, and then murders Henriquez's beloved in order to get rid of the competition.
* In the ''Literature/{{Dragonlance}}'' series, Kitiara Uth Matar decides her romantic rival, the elven princess Laurana, is too beautiful to let live and plots to kill her. [[spoiler: Kitiara ambushes Laurana in the city of Tarsis and with the help of the sivak draconian, Slith, manages to subdue the elfmaid but is then driven off before she can actually kill Laurana. Later on Kitiara succeeds in kidnapping Laurana and is about to have her subjected to a FateWorseThanDeath when their mutual love interest, Tanis Half-Elven, rescues Laurana. Tanis then chooses Laurana over Kitiara mainly out of disgust over Kit's attempts at killing her rival.]]
* ''Literature/TheHouseOfNight'':
** Done twice. The first time, [[spoiler:it's adult vampyre Loren Blake in ''Chosen'']], and at the end of ''Tempted'', [[spoiler:Zoey's human boyfriend Heath gets the axe as well.]]
** In-story, it's [[{{Yandere}} Dallas]]'s motivation to try and [[spoiler:kill Rephaim. "I'm gonna fry him. And then whatever weird control he has over you is gonna be gone. You and me can be together, and I won't tell shit about what happened here, as long as you're my girl."]]
* ''Literature/TheSorrowsOfYoungWerther'' plays with this trope a bit - Werther considers playing it straight and killing Albert, realizes he can't, and then [[spoiler:inverts it by killing himself instead.]]
* ''Literature/BloodAndChocolate'': Rafe hopes to kill Aiden, though whether it's because he wants Vivian or because his relationship with Astrid has driven him to it is left unclear.
* Though he doesn't go through with it, Edward Cullen of ''Literature/{{Twilight}}'' seriously considers doing in Mike Newton for daring to touch Bella, and probably thought about murdering Jacob Black for the same reason.
* ''Creator/JinYong'': Zhou Zhiruo made a huge effort to secure her position in Wuji's heart - including attempting to murder any and every woman that got in the way. And then there's Ah Zhi with Xiao Feng... let's face it, anyone who looks to be a nuisance or gets in the way of her and her brother-in-law must die.
* ''Literature/TheTinDrum'': Inverted. [[spoiler:Agnes [[DrivenToSuicide kills herself]] rather than choose between Matzerath and Jan. This way, neither of them has to lose her to the other.]]
* In Gaston Leroux's ''Literature/ThePhantomOfTheOpera'', the narrator speculates that the mysterious figure Raoul shot on his balcony really ''was'' Erik coming to kill him, but circumstances forced him to change tactics. After Raoul comes to rescue Christine, Erik tortures Raoul to the brink of suicide in a DeathTrap before turning it into a DrowningPit, telling Christine that "she didn't need two fiancés," and only releases Raoul when Christine [[ScarpiaUltimatum swears to marry him]].
* Tim the Ostler from Alfred Noyes' poem "The Highwayman", who is insane and deeply in love with Bess the landlord's daughter (and the Highwayman's love interest), is presumably the one who tipped off the Red Coats about the highwayman.
* In Creator/RobertEHoward's "Literature/TheSlitheringShadow", because Literature/ConanTheBarbarian is too loyal to his slave girl Natala to be seduced by Thalis, Thalis abducts Natala, intending to have her killed.
* [[spoiler:Eleyna]] in the Franchise/StarTrek novel "The Vulcan Academy Murders". [[spoiler:Sendet]] as well was at least considering it.
* It's implied, but not outright stated, that [[spoiler:Littlefinger]] had this in mind for [[spoiler:Eddard]] in ''Literature/ASongOfIceAndFire'', so he could steal [[spoiler: his wife Catelyn]]. Mind you, [[spoiler:he was probably aiming for 'disgrace and permanent exile' and not actual death: When Joffrey actually decides he wanted Eddard dead, [[SpannerInTheWorks that probably ruined Littlefinger's plan]], but the man's actual intentions are still unclear so for all we know he wanted it to happen.]]
* ''Literature/{{Mistborn}}'' contains an ''unintentional'' example- or arguably two.[[spoiler: Vin kills Elend's ex-fiancee, Shan Elariel, who was attempting to kill Elend at the time, and later Zane in a triangle where ''she's'' Alice]]. Actually, that particular romance advances via death ''four times''.
* ''Literature/ThePrincessBride'': When Buttercup gives Prince Humperdink TheReasonYouSuckSpeech, he throws her into her room. Then he races down to where her true love Wesley is being tortured, and sets the torture device on maximum, almost killing him.
* ''Literature/PeterPan'':
** Tinkerbell did ''not'' by any means like Wendy, she even tried to ''kill her''. All because Peter paid more attention to her than Tink. Most adaptations keep the general clinginess but tone it down from "homicidal fury." This also occurs in the film adaptations.
** The mermaids were precious little better, but, then again, they don't seem to like anyone in the book (The {{Disney/Peter Pan}} Disney mermaids... well, they aren't much better than Tink. They do take particular distaste in Wendy whatever the version and try and drown her.)
* In ''Literature/DoubleIndemnity'', Phyllis collaborates with Walter to kill her estranged husband and try to MakeItLookLikeAnAccident to get double indemnity on his insurance policy.
* In Tolkien's ''Literature/TheSilmarillion'', after betraying the city of Gondolin in return for its princess Idril, Maeglin tries to clean up the loose ends by killing her husband Tuor and son Eärendil.
* ''Literature/ThereseRaquin'' centers on Thérèse and Laurent killing her husband, Camille, so they can be together.
* Linda Fairstein's first Alexandra Cooper novel, Final Jeopardy, features an erotomaniac woman who stalks and kills a movie star she perceives as standing between her and the object of her infatuation.
* In Creator/PoulAnderson's ''Literature/TimePatrol'' story "Brave to be a King", Manse feels the temptation, when he doesn't even have to kill the man. According to Time Patrol rules, leaving Denison in place, which would preserve history, is the right thing to do. He'd live out his life, and his widow would doubtlessly grieve and recover.
* ''Literature/TheCatWho'' series contains a book where [[spoiler: Melinda Goodwinter]] tries to kill Qwill's love interest so that she can have him for herself, though it's unclear if she's really after Qwill or just [[GoldDigger his money]].
* The villainous Shoteka from ''Literature/SeekerBears'' tries to kill Toklo so he could try and mate with his (Toklo's) mother. This is [[TruthInTelevision true in real life]] since male bears will sometimes kill a female's cubs to mate with said female.
* In ''Literature/ThoseThatWake'''s sequel, ''What We Become'', it's not murder, but close. [[spoiler: Rose tries to replace Mal's memories of Laura with herself]].
* This backfires ''spectacularly'' on Lorenzo Mura in Elizabeth George's Series/InspectorLynley novel ''Just One Evil Act''. He's with Angelina Upman currently, but when her daughter by a previous lover named Azhar goes missing Azhar comes to Italy to help in the search, and he's very put off by how the two clearly still have feelings for each other. So Mura hatches a scheme to [[spoiler:poison Azhar using some E. Coli he procured from a friend in his wine -- and problem #1 is that Azhar is a devout Muslim who doesn't drink and passes on it when offered. Problem #2 is that Angelina drinks some instead, despite Mura's outburst, in front of a news crew no less, that she shouldn't, but no one there thinks twice about it since [[OneDrinkWillKillTheBaby she's pregnant]] and they figure that's why he's acting like that. Then Angelina gets sick and ultimately dies from the E. Coli, so Mura not only failed to kill his love rival, but also killed his lover and unborn child in the process. Sucks to be him.]]
* In the ''Literature/AgeOfFire'' series, it's speculated in-universe that [=RuGaard's=] LoveInterest Nilrasha killed his [[ArrangedMarriage arranged mate]] Halaflora so that she could have him for herself. However, she claims that Halaflora choked to death while eating more than she could chew, which given [[IllGirl Halaflora's health]], is entirely likely, and since the only other witness was [[CuteMute Rhea]], no one is ever able to confirm nor deny Nilrasha's story.
* ''Literature/KristinLavransdatter'': Erlend has promised himself to both Eline and Kristin. Eline tries to poison Kristin when she finds out about this, but Erlend thwarts this plan. Kristin forces Erlend to choose between her and Eline, and Kristin does nothing to prevent the death of Eline.
* In ''[[Literature/TheLastPoliceman Countdown City]]'' army veteran and restaurant worker Brett Cavatone leaves his wife to defend [[ColonyDrop "impact zone"]] refugees at the coast [[spoiler: and is murdered by his coworker Jeremy to make sure he doesn't come back.]]
* In ''TheWatchmakerOfFiligreeStreet,'' Grace [[spoiler: is convinced Mori will arrange this so Thaniel will go back to him; she tries to frame him for a bombing that almost results in ''her'' committing this trope instead.]]
* In [[Myth/KingArthur Arthurian myth]], King Mark does this when he finally finds evidence of Tristam's affair with Isolde. [[IfICantHaveYou He also kills Isolde.]]
* Raymond Gunt of ''[[Literature/WorstPersonEver Worst. Person. Ever.]]'' figures he's in two of these scenarios. He lusts after Sarah, and is more than eager to get rid of her boyfriend Stuart, so they'll be together. And after a drugged hookup with [[AbhorrentAdmirer Lacey]], he becomes determined to eliminate her, so that he'll be "free" for Sarah. [[spoiler:Lacey is later killed and Sarah goes with him, only for an UnsettlingGenderReveal to render Ray's efforts moot]].
* In Creator/AndreiBelyanin's ''My Wife Is a Witch'', the protagonist Sergey is a poet, who finds out that his wife is a powerful witch, who goes to the "[[AlternateUniverse dark worlds]]" every full moon [[VoluntaryShapeshifting in the shape of a wolf]]. Later, he discovers that there is an old werewolf named Owl who wants his wife for himself (although, it's implied that it's less her he wants and more her power) and keeps trying to kill Sergey. Fortunately, Sergey finds out that, while in the "dark worlds", his poetry turns into powerful spells, making him a sorcerer. Of course, Sergey's wife has no intention of leaving her husband for the werewolf, but Owl couldn't care less, planning on casting a MindControl spell on her.
* Touched on in ''Literature/HarryPotterAndTheDeathlyHallows''. Severus Snape [[spoiler:loves Lily, who is married to James and has a barely one year old son with him. When the family is threatened by Voldemort, Snape pleads with both Voldemort and Dumbledore to save Lily's life, but seems to be perfectly fine with James and Harry being murdered. It isn't really clear if Snape does this to get a chance to woo Lily, or if he simply wants to save her life. Events develop to make the point moot.]]
* In ''Literature/TheShatteredKingdoms'', In the second book, Vrinna (who loves the emperor) attacks Kira (the emperor's mistress). She stops just short of actual murder, because murder would have consequences but if she can beat Kira's secret out of her, it might well be something that could get Kira killed legitimately.

[[folder:Live-Action TV]]
* Inverted in the episode of ''Series/StarTrekTheOriginalSeries'' "Requiem for Methuselah". In the episode, an immortal human named Flint creates an android mate called Rayna for himself. He has Captain Kirk date Rayna so her ability to love awakens. He succeeds too well. When Flint and Kirk fight over her love, she cannot handle the emotional conflict and it destroys her.
* In the ''Series/StarTrekVoyager'' episode "Fair Haven", Captain Janeway finds herself attracted to the program's resident bartender Michael Sullivan...until she finds out that his character is married. Janeway decides to do a little "reprogramming" so that the wife never existed in Sullivan's life.
* An episode of ''Series/LawAndOrder'' features the rather creepy example of a man who, obsessively in love with his best friend's wife, murdered him and framed it to [[MakeItLookLikeAnAccident look like an accident]]; the grief-stricken wife later independently fell in love with and married the best friend, completely unaware that she was marrying not only the man who murdered her husband but her own stalker.
** Another episode deals with a woman with erotomania who kills the wife of the man she's obsessed with. That she's otherwise incredibly intelligent, cogent, and calm leads the police to believe she's actually having an affair with the man and that they conspired to kill his wife.
* In ''Series/{{Lost}}'', resident MagnificentBastard Ben Linus had a crush-turned-obsession on Juliet. She, on the other hand, was with Goodwin. You don't need a degree to figure out what happens to the poor fool.
* In ''Series/{{Rome}}'', it's pretty much standard procedure to kill someone in the event of any romantic complication. Need your daughter for a political marriage? Have her husband killed. Found out your best friend's wife has a child by another man? Kill him and dump him in the sewer. Want a married man? Poison his pregnant wife!
** Found out the slave that you just freed in order to marry her is already engaged? Bash her fiancé's brains in!
* Alpha in ''Series/{{Dollhouse}}'' takes this UpToEleven - he tries to kill every person who loves Echo. However, he focuses particularly on [[spoiler:Paul Ballard]], because he's the only one she feels the same way about.
** Alpha does get some of his marbles back in the series finale, taking place in the BadFuture. [[spoiler:After Paul is killed, he leaves Echo a mental copy of the guy, so they can be together, sort of.]]
* In ''Series/DesperateHousewives'', this happens when Bree tries to get back to her cheating husband Rex by going out with George, the local pharmacist and StalkerWithACrush. Eventually she realizes that she considers George just a friend and goes back to Rex, who had recently had a heart attack. George then continuously switches Rex's pills until he dies and then proceeds to date Bree again.
* In ''Series/DeviousMaids'', Ty thinks that his uncle Spence is the reason why Carmen isn't interested in him, and tries several things to change her mind, including [[spoiler: poisoning Spence and faking a robbery]].
* The third season of ''Series/MightyMorphinPowerRangers'' has this with Kimberly, Tommy, and Katherine. To be fair, Kat was under an evil spell at the time; once she gets free Kim even names her successor as Pink Ranger. Next season (''Series/PowerRangersZeo''), Tommy/Kat would become the OfficialCouple after Kim sends Tommy a Dear John letter. (But years later in ''Series/PowerRangersDinoThunder, Tommy's still single with neither girl in sight...)
* ''Series/CoronationStreet'' recently played out this trope. When Tony Gordon learned that his fiancee Carla Connor had feelings for her former brother-in-law Liam Connor, he arranged to have Liam run over.
* ''Series/{{Oz}}''
** Ryan O'Reily orders his brother to kill Dr. Nathan's husband, thinking he could win her over if her husband was gone. Sad thing is that [[spoiler:he was right]]. The fact that he also [[spoiler:killed the man who raped her, which is possibly the only time he's gotten his own hands dirty as he usually manipulates others into doing the deed for him,]] had a lot to do with it.
** Chris Keller, when he basically kills all of Beecher's previous lovers as well as his father's murderer.
* Two-thirds of all ''Series/{{Monk}}'' episodes involve this.
* ''Series/NoahsArc'': [[spoiler:It's strongly implied Guy is planning to kill Alex and make it look like a suicide in order to be with Trey (note that Trey is totally oblivious to any of this]].
* A deliberate example of this is attempted by a character in ''Series/TerminatorTheSarahConnorChronicles.'' [[spoiler:Jessie]] pushes [[spoiler:Riley toward John]] in an effort to force [[spoiler:[[RobotGirl Cameron]] to consider her a threat, and therefore force Cameron to kill Riley, all in an effort to alienate John and Cameron.]]
* ''Series/{{Smallville}}'':
** [[spoiler:[[VillainTeleportation Alicia]]]] tries to kill Lana for this reason.
** Lana tried to kill Chloe once. No, really. [[spoiler:Mind Control.]]
** The Jimmy-Chloe-Davis triangle of Season 8 ended in this way, with an attempted use of the trope by [[spoiler: Jimmy]], a successful use of the trope by [[spoiler:Davis]] and [[spoiler:a last-minute [[TakingYouWithMe equalization]] of the sides, leaving Chloe all alone.]] If Chloe [[FaceHeelTurn goes dark]], this will be [[StartOfDarkness where it started]].
** Many girls also try to kill Lana, Chloe, or Lois to have Clark for themselves.
--->'''Maxima:''' (about to punch Lois) I finally found the man I waited for all my life, and '''you can't have him'''!!!
* ''Series/{{Battlestar Galactica|2003}}'': [[spoiler:Galen seems to have his own little cycle going with his girlfriends. Cally kills Boomer. Tory kills Cally.]]
** [[spoiler:And finally, Galen kills Tory, although admittedly, Tory never seemed to be very into Galen, and more into a rather warped sense of self-preservation. Either way, hope it was worth it girls.]]
* [[spoiler:Freddie]]'s fate at the end of S4 of ''Series/{{Skins}}'' [[spoiler:(killed by Effy's deranged psychiatrist)]].
* In ''Series/RobinHood'', [[DesignatedHero Kate]] picks up a bow and arrow and deliberately tries to shoot Isabella dead, her rival for Robin's affections. Interestingly, when Isabella tries to drive a wedge between Robin and Kate, she resorts to non-violent trickery and uses a broken locket to make Kate believe that Robin is cheating on her. [[MoralDissonance Now guess which one's the hero and which one's the villain.]]
* In the ''Series/{{Merlin 1998}}'', Merlin attempts to defy this trope by convincing Uther not to kill the husband of Igraine, but Uther does it anyway.
** In the ''other'' TV show of ''Series/{{Merlin 2008}}'', Arthur snaps and tries to kill Lancelot after he catches him passionately kissing Guinevere on the eve of their wedding. Only Gwen and Merlin's intervention saves Lancelot's life.
* [[spoiler:Penelope]] attempts to do this on ''Series/SonnyWithAChance''. She [[spoiler:replaces a cheeseball that Sonny needs to fire from a cannon at her high school's homecoming with a cheese''bomb'', planning to have Sonny be killed so that Chad would be free to date Penelope instead. Chad refuses and survives Penelope's IfICantHaveYou plot, getting to Wisconsin along with the So Random cast in time to save Sonny.]]
* In one episode of ''Series/{{Bones}}'', a female suspect who had previously stalked the victim becomes amoured with Booth after he had briefly comforted her. Once she saw that Booth paid more attention to Bones (naturally, [[{{UST}} of course]]), she brought a gun with the intent on killing Bones right there and then.
* One episode of ''Series/{{Flashpoint}}'' deals with a husband and wife who had tried unsuccessfully to have a baby multiple times. The wife mistakens her husband's frustrations and efforts to convince her to give up for cheating on her with his ex-girlfriend [[spoiler: She wasn't entirely wrong]] and promptly tried to kill the girlfriend.
* A twisted one in the episode "Seven Seconds" of ''Series/CriminalMinds'' occurs, where the kidnapped girl was found to be molested by [[spoiler:her uncle]] and was kidnapped and almost killed by [[spoiler:her aunt]] to "protect" the family, though Prentiss implies that it was also to make up for [[spoiler:the fact her husband didn't want her as much compared to her niece.]]
* In ''Series/KamenRiderKiva'', Wataru and Mio are in love, but Mio is due to have a forced marriage to his brother Taiga. Wataru refuses to kill Taiga, so Mio attempts to do it herself by running him through with a sword at their wedding. [[spoiler:This proves fatal not for him, but her - he survives and she is killed by Bishop.]]
** Before ''Kiva'', this was the solution of [[Series/KamenRiderDenO Ryutaros]], with the hypotenuse being Yuto Sakurai/Kamen Rider Zeronos, believing that doing so will win Airi's heart[[note]]Ironically, he chose not to carry out his original objective, to kill Ryotaro Nogami, Airi's younger brother, after realizing his death would make her cry[[/note]]. Of course, [[DenserAndWackier given the type of series Den-O is]], it's PlayedForLaughs, and he fortunately never actually carries the deed out.
** Years earlier, ''Series/KamenRiderFaiz'' gave us Masato Kusaka, who had an [[StalkerWithACrush obsessive one-sided crush]] on his childhood friend Mari Sonoda[[note]]Appropriately enough, Mari and Mio are played by the same actress, Yuria Haga[[/note]] and would smoulder and plot the murder of anyone he thought was trying to court her, particularly the main character Takumi Inui. [[spoiler:In the prequel story to TheMovie, he actually does kill Shuji Mihara[=/=]Kamen Rider Delta by throwing him to a monster, made worse by the fact that Mihara wasn't even interested in Mari; Kusaka was just jumping to conclusions and refused to listen to anyone.]]
* In ''Series/TheWalkingDead'', [[spoiler:Shane tries this in season 2 by luring Rick out to secluded field where he can shoot him and pin the blame on another person he killed. He tries to justify himself by claiming that Rick is a weak man and a weak father who isn't willing to get his hands dirty fighting for his wife and children. Rick proves Shane very wrong moments later by pretending to hand Shane his gun only to gut him like a fish.]]
* ''Series/BuffyTheVampireSlayer'':
** [[FullyEmbracedFiend Veruca]] attempts to murder Willow so she can have Oz to herself and make him accept [[OurWerewolvesAreDifferent her way of being]]. "To keep what's yours, sometimes you have to kill."
** When Xander has Amy cast a love spell to win Cordelia back, many of the girls wind up attacking each other with the intent to kill off their rivals.
* In ''Series/OnceUponATime'':
** The [[{{Disney/Aladdin}} genie of Agrabah]] kills Snow White's father so he and Queen Regina can be together. Unfortunately, she was never in love with ''him'', and only [[BatmanGambit pretended to be so that he'd do that]].
** Regina Mills (Queen Regina, in Storybrooke) uses the last of her magic to grab a poisoned apple from the Fairy Realm to bake a special apple turnover for protagonist Emma so she can get rid of her adopted son's biological mother and have Henry all to herself. Henry immediately intervenes and eats the turnover to protect Emma, falling into a magical coma, forcing his biological and adopted mothers to [[EnemyMine work together]] to break the spell.
* ''Series/{{Glee}}'', being primarily a comedy show, plays with this and has several characters trying to do this in various dramatically high school-minded and therefore non-lethal ways. Of note is Sebastian, who tried to [[EyeScream blind Kurt]] with a slushie [[spoiler:that was laced with rock salt. Blaine - the Alice in the situation - ends up [[TakingtheBullet taking the slushie]] instead. The incident, in fan-theory, leads Blaine to avoid and become guarded around Sebastian and treat him more like an actual threat like everyone else does]]. Oops.
* ''Series/TheVampireDiaries'' has an interesting subversion. Tyler and Caroline are blissfully in love, but Klaus wants Caroline. Tyler [[spoiler:leads a rebellion of hybrids against him, and Klaus' extremely unforgiving nature demands that he kill Tyler. Klaus ultimately refrains, realizing that it would fall under this trope and he'd never have a chance with Caroline.]]
* In ''Series/{{Copper}}'', [[spoiler:Eva Heissen]] slit Molly's throat when she found out about her pleasuring Kevin.
* In episode 2.07 of ''Series/TheMusketeers'' Sophia Martinez shoots [[spoiler:Bonacieux when he stumbles upon her assassination attempt. She later claims this was to do a favor to Constance and D'Artagnan.]]
* In an episode of ''Series/{{Supernatural}}'' Zombie Angela tries to kill a girl Neil had gotten with.
* ''Series/{{Gotham}}'': Barbara cheats on Jim Gordon with other men and women but flips out if she thinks he's cheating on her. When Barbara calls Gordon's penthouse, Ivy Pepper answers and lies that she is Gordon's friend. Barbara takes this as Ivy being Gordon's new lover and tells her to "Go to Hell." She also attacks Leslie with a knife presumably because she had gotten together with Gordon in her place and again tries to stab her when Leslie hits Barbara where it hurts after Barbara states she's going to win Jim back from her.
* ''Series/BatesMotel'': Mother does this to Bradley when she was getting close to Norman.
** Norman does not approve of anyone trying to get between him and his mother whom he admits he has sexual feelings for. Sheriff Romero marries her so she can have insurance to help pay for Norman's medical bills. He maintains that he's not happy with the arrangement and tries to get Romero to leave. He looked like he wanted to attack Romero with an axe at one point before attacking a building with it and screaming "I hate you!" He ended up trying to commit a MurderSuicide with his mother so he could be TogetherInDeath with her. When she wound up dying and he lived he ended up digging up her body and talking to it while hallucinating that she was alive.

* This happens sort of incidentally in volume 16 of ''Manhwa/CielTheLastAutumnStory''. [[spoiler:Lariatte ''was'' Krohiten's main competition for being Yvienne's most important person, but the actual reason he helped orchestrate Lari's death was to use Yvienne's response to her death as part of a plan to prevent the predicted extinction of mankind.]] And the death wrecks their relationship anyway.

* Essentially the theme of the song "Rocky Raccoon", by Music/TheBeatles from Music/TheWhiteAlbum. Between that song and "Run For Your Life," from ''Music/RubberSoul'', you really have to wonder about the Beatles' relationships.
* "Jenny Again", by Tunng. The titular Jenny is the equivalent of the example's Alice: the listener is put into the position of Bob, and the singer is in the position of Chris.
* "Bloody Valentine" by Music/GoodCharlotte.
* ''Wake-Up Call'', from Music/{{Maroon5}}
* ''1963'' by Music/NewOrder is based on the conspiracy theory that UsefulNotes/JohnFKennedy's assassination was really an attempt by him to do this to Jackie GoneHorriblyWrong.
* ''Goin' Down'' by The Pretty Reckless.
* ''Here I Sit in Prison'' by Cowboy Mouth
* The point of view character for ''Ex-Lover's Lover'' by Voltaire dreams of doing this, but at the end admits he would never have the guts to go through with it.
* In "Hide Your Heart" by Music/{{KISS}} Rosa and Johnny fall in love. The problem is, Tito happens to be dating Rosa, and he is furious that he is being replaced. [[spoiler:Johnny gets shot by Tito.]]
* Music/{{Hurt}}:
** The POV character of "Got Jealous".
** A woman threatens FalseRapeAccusation to coerce her lover into this in "Pandora" (though it's implied to be more about her husband's life insurance than love.)
* The "Story of Evil" song series in the Franchise/EvilliousChronicles has an event where Princess Riliane is so furious that King Kyle rejected her proposal of marriage because he was in love with a green haired woman in Elphegort that she decided to ''murder all of the green haired women in that country because she didn't know which one he was in love with.'' It's brought up in [[LightNovel/ClotureOfYellow the tie-in novel]] as [[NiceJobBreakingItHerod the main reason her kingdom's citizens decided to rebel.]]
** Also from the Franchise/EvilliousChronicles, but from the SevenDeadlySins series (specifically the song of [[GreenEyedMonster Envy]], The Tailor Of Enbizaka), [[UnreliableNarrator Kayo Sudou]] murders ''three hypotenuses'' in order to be with her [[YourCheatingHeart lover]], [[spoiler:except her lover was DeadAllAlong, and [[MistakenForCheating the person she thinks is her lover is a completely different person]], and the hypotenuses were his wife and [[MistakenForPedophile two children]], and this is even [[LampshadeHanging pointed out]], and yet she ''still'' thinks it's her lover.]] Justified (somehow) since [[spoiler::she was being possessed by the [[SevenDeadlySins Demon of Envy]]]].
* The singer of Jayn's "[[https://www.youtube.com/watch?v=D5KGbxNTDB8 Smoke And Mirrors]]" repeatedly suggests she will kill her crushes wife if he doesn't tell her he loves her, and her alone. [[spoiler:The ending heavily implies she did it anyway.]]
* One episode of ''Deadly Women'' on Investigation Discovery featured a case of this where "Alice" was in on it. The woman had a pattern of getting married, meeting another man, convincing the other man to kill her current husband, marrying the other man, then meeting another man...What made the plan nearly foolproof was that the other man usually did all of the killing, and then the next man would kill that guy, so that there was virtually no proof of the previous crime.

[[folder:Newspaper Comics]]
* In ''ComicStrip/FlashGordon'', in the city of the hawkmen, the king's favorite goes to murder Dale when she is sent to the harem.
* A bizarre example happened not once, but ''twice'' in ''ComicStrip/{{Peanuts}}''; Lucy started to think that Schroder's piano was a sort of "competition" that kept him from paying attention to her, so she tried to destroy what she saw as her "rival" on two separate occassions, the first time throwing it to the Kite Eating Tree and the second time throwing it down the sewer. While technically she destroyed the piano both times, it didn't help; Schroder just got a new one each time. (And the second time, threatened to slug her if she "scratched it with her stupid elbows".) It would seem that the piano was ''not'' the problem at all (as anyone who knows Lucy can surmise.)

[[folder:Tabletop Games]]
* Happens in the continuing example game in ''BlissStage'', prompted by Josh asking Keenan what he thought of the love interest Sara. His response: "Man, she's getting all ''girly'' and ''clingy'' and shit. [[KickTheDog Lousy lay, too.]]"
* Choosing to MurderTheHypotenuse -- [[CainAndAbel his own brother]], no less -- is what made Strahd von Zarovich into TabletopGame/{{Ravenloft}}'s first darklord.
* In the far-flung history of the [[ProudWarriorRaceGuys the Clans]] in ''TabletopGame/BattleTech'', Khan Ellie Kinnison of Clan Steel Viper was obsessively in love with the Clans' supreme leader, Ilkhan Nicholas Kerensky. However, Kerensky was married to Jennifer Winson of Clan Wolf. Kinnison had the brilliant idea of trying to murder Winson so that [[ComfortingTheWidow a grieving Kerensky would turn to her for solace.]] Only timely intervention of Kinnison's saKhan Steven Breen spoiled the plot. Trying to assassinate Winson while she was traveling with Kerensky probably didn't help her case either. Kinnison was killed in the attempt on Winson's life by Breen who shot her and received a KlingonPromotion.

* ''Theatre/{{Medea}}'': The original WomanScorned, she killed her husband Jason's new fiancée after being dumped for her. This wasn't an attempt to win him back, however, but pure and simple revenge, particularly when she also put her children by Jason to the sword just to make him suffer all the more.
* In ''Theatre/SweeneyToddTheDemonBarberOfFleetStreet'', Judge Turpin fancies Benjamin Barker's wife, and has him convicted of a crime he didn't commit and shipped off to Australia to get him out of the way. However, as in ''The Crooked Man'' example above, he escapes from prison and returns to get his revenge on the judge.
** Arguably, Mrs. Lovett, with Sweeney and [[spoiler:Lucy]]. [[spoiler:She doesn't really do anything to Lucy, but still she lies and claims she's dead, just so she can have Sweeney all to herself.]]
* Attempted in ''Theatre/TheCrucible''. [[{{Yandere}} Abigail Williams]] is in love with John Proctor, and tries to get Proctor's wife Elizabeth hanged as a witch. Due to a bit of DeusExMachina, [[spoiler:she not only fails (Elizabeth is pregnant and can't be executed), but she gets Proctor himself hanged instead as he chooses to take the heat.]] Oopsie.
* In ''Theatre/LittleShopOfHorrors'', Seymour almost does this with Audrey's boyfriend Orin. He loses his nerve, but Orin dies immediately afterward through his abuse of his laughing gas and Seymor's inaction. Of course, this is less because he's dating Audrey and more because he's abusing her.
** Arguably, Audrey II him/her/itself attempts this when it tries to off the original Audrey, depending on how you interpret the plant's relationship with Seymour.
* In a subversion, in ''Theatre/AvenueQ'', after Princeton breaks up with Kate and later gets together with TheVamp [[MeaningfulName Lucy the Slut]], [[spoiler:Kate angrily throws the lucky penny Princeton gave her off the Empire State Building, hitting Lucy, breaking her neck, and putting her into a coma.]] Oops.
-->'''Princeton:''' [[spoiler:Can you believe it? Some idiot dropped a penny off the Empire State Building.]]
-->'''Kate:''' [unconvincingly] Shit.
* Andrew Lloyd Webber's adaptation of ''Theatre/ThePhantomOfTheOpera'' also has Erik threatening to murder Raoul [[ScarpiaUltimatum if Christine refuses to submit to him]].
* Double subverted in ''Theatre/TheWomenOfTrachis''. Lichas is reluctant to tell Deianira that her husband Herakles is madly in love with Iole for fear she'll become hysteric and do something drastic. Deianira actually just pities the girl, and understands that LoveHurts even for Herakles. However, not comfortable with the thought that having Iole in the house will compromise her family, she decides to use a love potion on Herakles to get his affections back, which is actually a poison that kills ''him''.
* Averted in the Creator/WilliamShakespeare play ''Theatre/TheTwoNobleKinsmen.'' [[spoiler:Arcite dies of an unrelated injury after the duel against Palamon that he won.]]

[[folder:Video Games]]
* A variation in ''VideoGame/SuperRobotWarsW'': Aria wants to kill Kazuma over his ''sisters''. Makes a bit more sense when you learn that Aria is [[spoiler:sort of an OppositeSexClone of Kazuma, loving his sisters as if they were her own and hating him for having "her" place in the family.]]
* One of the possible endings of a sidequest in ''VideoGame/JadeEmpire'', best described as "childhood promise gone wrong". Once you gather the poor man, the mobster woman he "promised" to marry (at all of about eight), and his fiancee, you could convince the mob boss to call off her pursuit... or, convince her to kill the fiancee. Which she does. At which point, the man rightfully objects -- so she kills him. Finally, having [[WhatHaveIDone realized she didn't mean it]], she tries to kill ''you''. [[KicktheDog Good job, jerk]].
* In ''[[VideoGame/BaldursGate Baldur's Gate II]]'', NPC Aerie can be romanced by both the player character and fellow NPC Haer'Dalis. If she chooses you, he'll back down, but if her romances with both proceed at about the same pace, he tries to settle things in this manner.
** It can also happen if you keep Viconia, Jaheira, and Aerie in the party at the same time and don't break off the romance with any of them.
* The bad ending of ''VideoGame/IrisuSyndrome'' stands out in this regard, since [[spoiler:one point of the triangle kills ''everyone in the vicinity'', including the person she originally loved]].
** The ExpansionPack then proceeds to play with this in shocking fashion, in that [[spoiler:said originally loved person ''wanted it to happen that way, and [[BatmanGambit purposely tried to set said point off]]''.]]
* In ''VideoGame/ChronoCross'', this is apparently played straight when [[spoiler:Karsh murdered Dario in the Isle of the Damned]]. Subverted when it turns out that [[spoiler:Dario was possessed by Masamune at that time, and when he declared his intent to slate the Masamune with Riddel's blood, Karsh went berserk and struck him down]].
* Happens in ''VideoGame/RuleOfRose'' as a testament to the LoveMakesYouEvil-trope: [[spoiler:Jennifer and Wendy swear eternal love and devotion to each other, but then Jennifer finds a puppy and decides to keep it. Wendy doesn't want to share her affections with a "filthy animal", so poor Brown is toast, along with their relationship. For bonus points, they were maybe ten years old at this point.]]
* Toward the end of Kain's miniature dungeon in ''VideoGame/FinalFantasyIV Advance'', he is given the choice of killing Cecil or facing Dark Bahamut. Much of the previous trial highlighted presumed romantic jealousy that Cecil has Rosa's love, but the correct answer, choosing not to kill Cecil, signifies him coming to terms with this.
* Inverted in one quest in ''VideoGame/ArcanumOfSteamworksAndMagickObscura'': Wrath, an insane wizard, [[GreenEyedMonster is envious of]] Sharpe the apothecary for his happy relationship with Ivory, but [[ApeShallNeverKillApe also believes in the adage that elves do not kill each other]]. So he instead commits suicide with a glass of poisoned wine [[SuicideNotMurder in the hope that Sharpe will be blamed for his murder]].
** His plan is foiled by the investigating officer believing in 'elves do not kill elves' a bit too much as well, and thus arresting Wrath's apprentice (a dwarf) for the murder simply based on the 'fact' that [[FantasticRacism he's the only non-elf around and thus the only one who could have done it]].
* Attempted by Marco Barbarigo in ''VideoGame/AssassinsCreedII'', when he pays thugs to kill Dante Moro, Captain of the Guard, so that he can marry Dante's wife Carlotta. In a variation, Dante survives, but is left [[PsychopathicManchild severely brain-damaged]] and [[ExtremeDoormat extremely impressionable]], which allows Marco to talk him into annulling the marriage.
* A double disturbing example in ''VideoGame/AssassinsCreedBrotherhood'' comes from both Cesare and Lucrezia Borgia, brother and sister in an incestuous relationship. Lucrezia brutally beats Caterina, who is their prisoner, because she believes Caterina attempted to seduce her brother during the long carriage ride to their home (which she didn't). Lucrezia, however, is in a relationship with an actor simply to make Cesare [[OperationJealousy jealous]], so he orders his men to kill said actor.
* Sodia tries to do this to Yuri in ''VideoGame/TalesOfVesperia'' because she's jealous of his bond with Flynn and thinks Flynn would be better off without his [[HoYay closest friend]]. Yuri, to his credit, never actually tells Flynn what she tried to do. Probably because he knows what Flynn would do if he found out.
* A variation of this exists in ''VideoGame/TeamFortress2'': Never touch the Heavy's weaponry or else he'll mow you down with it
* ''VideoGame/{{Catherine}}'': [[spoiler:Katherine does this to Catherine (bear with me) with a knife in an animated cutscene before Stage 8.]]
* Invoked [[spoiler:and ultimately averted]] in ''VideoGame/BlazBlue'', when [[spoiler:Hazama uses Tsubaki's ClingyJealousgirl tendences over Jin and amps them UpToEleven. She then sets out to kill her best friend Noel upon the belief that she's stolen ''her'' rightful place next to him.]] [[spoiler:But even then, once Tsubaki angrily curbstomps Noel and the physically/emotionally wounded Noel lies on the ground, waiting for the death blow... Tsubaki cannot bring herself to finish Noel off, and breaks down crying.]]
* [[VideoGame/HyruleWarriors Cia]] starts a war with Hyrule in an attempt to kill Zelda and make Link hers. [[spoiler:It goes as well as you think it does.]]
* In ''VideoGame/SinAndPunishmentStarSuccessor'', if you're playing as Kachi and you fight Hibaru, Hibaru asks Isa on a date "once she's done killing his girlfriend".
* ''VideoGame/YandereSimulator'' presents this as an objective to making sure your Senpai doesn't fall in love with anyone else. There ''are'' non-lethal methods of eliminating rivals, such as getting them kicked out of school, winning their trust and convincing them to dump him, or setting them up with someone else...but that's not as fun, now is it?
* In ''VideoGame/{{Belladonna}}'' this occurs [[spoiler: twice in the same triangle, thanks to reanimation.]]
* After the prologue sequence in ''VideoGame/WhenYanderesCry'', Nishiki finds his girlfriend has fallen victim to this.
* In ''Rite of Passage 5: Heart of the Storm'' Rob burns Omni alive in the latter's cabin because Omni and Ashley are in love with each other.

[[folder:Visual Novels]]
* In ''VisualNovel/HigurashiWhenTheyCry,'' this was Shion's solution to the problem that her crush Satoshi was spending all his time caring for his little sister Satoko and not realizing the {{Yandere}} existed (Literally. She always made a TwinSwitch with Mion before they talked). Rena and Rika [[GoThroughMe manage to stop her]], and then she gets PunchedAcrossTheRoom by a fucking pissed off Satoshi. And this is when she was sane; when she snaps, she decides to KillEmAll.
* In ''{{Tsukihime}}'', [[spoiler:Arcueid]] tries it on [[spoiler:Ciel]] in Ciel's route, [[spoiler:SHIKI]] tries it on [[spoiler:Shiki]] in Akiha's route, and finally [[spoiler:Akiha]] tries it with [[spoiler:Kohaku ''and'' [[IfICantHaveYou Shiki]]]] in Kohaku's route. Interestingly, in the Good Ending for Kohaku's route, [[spoiler:Shiki realizes that the reason Akiha fails to kill Kohaku is that she wasn't really trying]].
* In ''VisualNovel/UminekoWhenTheyCry'', Kyrie makes it very clear that, if Asumu hadn't died from other causes, she would have most certainly killed her within the year to be with Rudolf.
-->'''Kyrie:''' She was fated to die no matter what. The miracle was that I didn't have to get my hands dirty.
* In one ending of ''VisualNovel/BionicHeart'', Tanya kills Luke's girlfriend Helen because she is jealous of all the time Luke spends with her.
* The ''SchoolDays'' franchise is infamous for its bad endings, [[ExaggeratedTrope most of which involve this.]] Here is a list:
** [[spoiler:A mentally-broken Kotonoha snaps on Sekai and cuts off her throat on a bridge in broad daylight.]]
** [[spoiler:Sekai is the one who gets broken, then pushes Kotonoha in front of a train, and Makoto ends up with Kotonoha's torn-off arm in his hand when he fails to save her. (The original version of this ending came from the [=PS2=] port, and a new version was made for the HQ remake.]]
** [[spoiler:Sekai ''tries'' to push Kotonoha in front of a train, but she ends up falling in front of the tracks and is hit, while Makoto manages to pull Kotonoha back up and saves her. (Kotonoha is seen pulling on Sekai's hair at some point, which "helps" with her death -- it's unclear if this was intentional from Kotonoha or she did it while in a blind panic.)]]
** [[spoiler:Sekai tries to push Kotonoha in front of a train, falls on the tracks, and ''both'' girls get hit by the train.]]
** And in ''Cross Days'': [[spoiler:a full-on {{Yandere}} Kotonoha stabs Yuuki to death after finding out that he has been sleeping with Makoto as "Yuu".]] In another version of this ending, [[spoiler:Yuuki's older sister Chie claims that ''she'' is Yuu [[TakingTheHeat in order to protect Yuuki]], [[HeroicSacrifice and Kotonoha murders her instead]].]]
* In the eroge ''Artificial Academy'' and its sequel, characters with the "[[{{Yandere}} Evil]]" trait will attempt to murder anyone they catch having sex with their lover. If the hypotenuse happens to be you, their killing you will result in a GameOver.
* ''VisualNovel/DanganRonpa'' has a... weird example. The one whose affections the murder is occurring over is [[spoiler:a computer program named Alter Ego]].
* ''VisualNovel/YandereILoveYouSoIWantToKillYou'' has an ending where it's implied that [[spoiler:Saki]] kills Subaru's date.
* Since ''VisualNovel/StarstruckLove'' is a {{Yandere}} visual novel, it should be expected for someone (either one of the love interests or an NPC) to try this.

* Szark considered killing Luna so he could be with Dominic in ''Webcomic/DominicDeegan: Oracle for Hire''. This was a residual effect of the demonic wound that had gotten him addicted to killing, and [[http://www.dominic-deegan.com/view.php?date=2005-11-03 he resisted the temptation to even daydream]]. On the other side, Karnak really ''did'' try to kill Dominic's father in order to claim his mother.
* Oasis from ''Webcomic/SluggyFreelance'' is almost perpetually two punch daggers away from murdering even a vaguely perceived hypotenuse, and Torg lives in fear that it will eventually be Zoë, which it almost has been. The story "Fire and Rain" revolved around Oasis' deranged and Determinator stalking of Zoë. And then came "bROKEN"... Best not to even talk about that.
** Torg enlists Bun Bun and the Angsty Dentist to teach him the stalking skills he needs to kill Zoe's boyfriend Leo. In the end, he doesn't go through with it because he just want Zoe to be happy. Bun Bun, however, knew he was too much of a nerdboy to go through with it the whole time.
* Halfway averted in the love hexagon that is Starscream's Brigade in the ''Webcomic/{{Insecticomics}}''. While Dreadmoon doesn't actively try to kill Skyfire, the partner of his long-time crush Starscream, he has occasionally directed some "friendly fire" his way and sent him threatening Mini-Cons.
* Averted in ''Webcomic/GirlGenius:'' the LoveTriangle is complicated firstly by the fact that A) they're all mad scientists, and B) they all have conflicting loyalties, but the two romantic male leads are VitriolicBestBuds. Of course, a little romantic sabotage now and then is different.
* ''Webcomic/QuestionableContent'' never goes quite so far as to reach murder, barring the Vespavenger, but before Angus or [[WhamEpisode strip 500]], Faye was strangely [[strike:violently possessive]] protective of Marten. Dora even mentions it the first time Steve and Ellen broke up that "[Ellen] has no idea how close to death she just came" when Ellen began a comment that started like she was about to ask him out.
* Attempted by [[Webcomic/{{Sinfest}} Baby Blue]] when she tried to kill Criminy. Would have succeeded if not for the [[ChekhovsGun glitter points]].
* An unorthodox example in ''WebComic/EightBitTheater'', Black Mage has a severe lust for White Mage, He also has a love for killing. He recognizes both of these things, and also recognizes that White Mage has [[NoYay less than zero interest in him]]. His mind is so warped however, that early on he believes that the thing standing between him and doing White Mage are the people around him, [[YouFailLogicForever so the only possible solution is to kill 'em off!]]
* In ''Webcomic/GunnerkriggCourt'', [[spoiler:Diego]] appears to have pulled an IfICantHaveYou on [[spoiler:Jeanne]], but it turns out to have been this trope.
* In ''Webcomic/{{Pibgorn}}'', Dru's way of coping with Pibgorn.
* In ''Webcomic/KevinAndKell'', Vin Vulpen makes two attempts on Rudy's life, jealousy over his relationship with Fiona being one of a few motives. He tries to mark Rudy with prey pheromones to ensure that his teammates accidentally eat him, but Rudy manages to survive. He later challenges Rudy to a duel, wanting to win Fiona back, but Rudy exposes his domestication.
* In ''Webcomic/{{Erstwhile}}'', [[http://www.erstwhiletales.com/maidmaleen-30/ the bride tries to eliminate Maid Maleen]].
* In ''Webcomic/ThinkBeforeYouThink'', Sarah is jealous of Julia's relationship with Brian, and [[http://thinkbeforeyouthink.net/?comic=20130308-julia%27s-untimely-death fantasizes about killing her]].
* In ''Webcomic/GirlsNextDoor'', Erik trying to do this and failing was a RunningGag.
* In the roleplays of ''Webcomic/WhiteDarkLife'', Viv the electronic poltergeist, is madly in love with Ne, and repeatedly threatens to do this to Miriam (who is trying her damn hardest to win Ne's heart, but is blocked off by Ne having PTSD over her; Viv cites this PTSD as her justification, but nobody buys the excuse).
** In the webcomic itself, Artemis is hugely violent to Tori and Galaxina for being in love with and good friends with Matt respectively on the grounds that if [[EnemyWithout Dark Matt]] is her boyfriend, then the normal one is too.

[[folder:Web Original]]
* At the end of Act II of ''WebVideo/DoctorHorriblesSingAlongBlog'', Billy/Dr. Horrible resolves to kill his ArchEnemy Captain Hammer, who is dating his LoveInterest Penny. [[spoiler:The other leg of the triangle dies as a result, prompting Dr. Horrible's StartOfDarkness.]]
* WebVideo/TheNostalgiaChick tried to stab [[Creator/AllisonPregler Lupa]] in the chest for rejecting Todd again, even though Todd has no interest in the former and has always stalked the latter.

[[folder:Western Animation]]
* One of ''WesternAnimation/TheSimpsons''' "Treehouse of Horror" episodes centers around an house with AI that's in love with Marge. Homer [[TooDumbToLive explicitly points out]] that Marge would be available to "man or machine" if he were to die.
-->'''AI:''' Machine, eh?\\
'''Homer:''' Yep, a machine!
* ''WesternAnimation/DannyPhantom'', where Vlad constantly tries to kill his "best friend" Jack in order to win his wife Maddie's heart. He also has a creepy, stalkerish relationship with Jack and Maddie's kid and main character Danny [[spoiler:(to the point of trying to clone Danny and raise the clone as his own son, since Danny refuses to let Vlad adopt him)]].
* Subverted in ''[[WesternAnimation/JusticeLeague Justice League Unlimited]]'': Shayera Hol (Hawkgirl) and Mari (Vixen) are caught in a LoveTriangle with Franchise/GreenLantern John Stewart. He is currently with Mari, but he ''was'' with Shayera and everybody is aware that there are still [[{{UST}} unresolved feelings]] between the two of them. When Hawkgirl and Vixen are on a mission together ([[MyFriendsAndZoidberg with Vigilante]]) they are caught in a trap and hunted down by Thanagarians who want to execute Hawkgirl for war crimes. When Vixen is captured she immediately strikes a deal with the Thanagarians -- spare her and she will deliver Hawkgirl to them. She even goes so far as to cite the LoveTriangle as the reason she will betray her superior so quickly. However, she does not go through with it, [[FakeDefector nor did she ever plan to]]; once the Thanagarians let their guard down and bring her to their aircraft she hijacks the ship so she can get herself ''and'' Hawkgirl out of there safely. Later episodes play the trope for laughs as Shayera and Mari [[CharacterDevelopment begin to become close friends]], as Shayera comments that she is trying to learn proper Earth protocol for these situations and thusly can not just poison Mari's water like she would on Thanagar.
** The relationship eventually evolves into a quadrilateral by introducing Carter "Hawkman" Hall as a rival for Shayera's affection and the story wastes no time in getting to hypotenuse murdering: in Hawkman's second appearance, a physical manifestation of his dark side kidnaps John Stewart and orders Hawkman to kill him. Hawkman, [[IncorruptiblePurePureness being a hero]], does not comply. In fact, the events of the episode cause him to stop pursuing Shayera romantically as he realizes that [[BecauseDestinySaysSo she and John Stewart are literally destined to end up together]], [[ScrewDestiny despite what John Stewart says]].
** In the episode "Metamorphosis", a [[{{Squick}} squicky]] example occurs when an extremely OverProtectiveDad (who loved his daughter maybe [[ParentalIncest a bit too much]]) didn't like his daughter's fiancee so he tried to kill him. When that failed, he pretended that the one who told him to do it was the fiancee's old friend Green Lantern, while showing him a photo of Green Lantern and his fiancee embracing. The fiancee then invoked this trope himself as he went after Green Lantern in a rage.
* ''WesternAnimation/FamilyGuy'':
** Played (relatively) straight when Stewie falls for his new babysitter, only to learn that she has a boyfriend. He then kidnaps her boyfriend, breaks his legs, ties him up and locks him in the back of Brian's car, ultimately leading to his death. Stewie then prepares to make his move on Ledan, only to realise that she's completely broken up about her boyfriend. Arguably subverted at the end where Stewie receives a gift from her and assumes that she does like him (of course, considering he's a baby and she's a teenager, this is hopefully not the case).
** When Lois [[ItMakesSenseInContext sends Peter's ex girlfriend Gretchen an old love letter from Peter]] this ignites her romantic passion towards Peter and when she learns of Lois she attempts to shoot her dead.
* In ''WesternAnimation/{{Futurama}}'', Bender says he assumed Fry was only pretending to love his old dog to mess with Bender's emotions (not a romantic love triangle, but love nonetheless). So, he throws the dog into lava.
-->'''Bender:''' Now I'm all you've got!
** Of course, the dog is a fossil and thus already dead. Also, once he realizes that Fry genuinely loves his dog he dives into the lava to save the dog. You might even call it his MoralEventHorizon moment... if he weren't so comically evil.
** Tragically, when Fry learns his dog had lived several years after its supposed death, he himself breaks the hypotenuse by refusing to resurrect his pet, insisting, "He forgot me a long time ago." In truth the dog had spent the rest of its life waiting in vain for Fry to come home. This ending was so depressing that it was retconned in ''Bender's Big Score''.
** In ''Bender's Big Score'' Zapp Brannigan is all too keen on sending Leela's boyfriend Lars on a suicide mission to get him out of the way. Then again, Zapp is ALWAYS sending every single one of his crew members on suicide missions, so this is business as usual even if you discount his interest in banging a freshly grieving Leela.
* Wendy, Stan's love interest/girlfriend in the early seasons of ''WesternAnimation/SouthPark'', went so far as to have a substitute teacher arrested on false charges and locked inside a rocket launched directly at the sun, for the crime of having been the object of a brief crush from Stan. Don't get on ''her'' bad side! (The thing is, the teacher was a ''lesbian'' and Wendy didn't know that, so there's also a dose of PoorCommunicationKills involved.)
** What makes it either better or worse (depending on how you feel of said twist) was that the episode originally intended to have Ms. Ellen ''actually'' be a spy and be sent to the sun for her crimes. Parker and Stone tacked on the ending with Wendy paying off the Iraqis, as they felt the original ending was too much of a downer and that it'd be funnier if Wendy conspired to kill her.
** Happens in another episode when Satan gets caught in a love triangle between his old boyfriend, Saddam Hussein, and his new boyfriend, Chris. Satan can't decide who he wants to stay with, when Saddam decides for him and kills Chris. It's ultimately subverted. Since they were all already in Hell, Chris only comes back. [[RunningGag Where was he gonna go? Detroit?]]
* On ''WesternAnimation/JimmyTwoShoes'', Heloise builds a [[RobotMe robot double]] to be her assistant. She's very effective, but Jimmy falls in love with it. As you might expect, the robot didn't last the episode.
* [[DishingOutDirt Sadira]], from the ''WesternAnimation/AladdinTheSeries'', subverts this; she wanted Jasmine out of the way,[[spoiler: before she eventually got over Aladdin,]] but did not want her dead or seriously hurt, even explaining it in detail to a grunt.
* Parodied in ''WesternAnimation/PhineasAndFerb'' in the episode "Suddenly Suzy", where we find out Candace is very aware of this trope and hides anything she thinks could be used to kill her before Suzy arrives. Suzy herself isn't a ''romantic'' rival, but certainly sees Candace as a rival for her older brother Jeremy's attention.
* ''WesternAnimation/GeneratorRex'' features that CreepyChild minion of Breach's. She's never named, but she's absolutely obsessed with making Breach happy and tries to kill Rex when she realizes Breach likes Rex more.
* One episode of ''WesternAnimation/KidVsKat'' featured Coop going on a hike with a group of his friends, including his ImpliedLoveInterest Fiona and his StalkerWithACrush Phoebe. Being a rather terrifying {{Yandere}}, Phoebe spends the entire hike trying to get rid of Fiona, even locking her in an abandoned cabin and then leading the others further along the trail so that they wouldn't hear her calling for help.
* ''WesternAnimation/HeyArnold'':
** In the episode "Arnold Visits Arnie", at the end of Arnold's NightmareSequence, Arnie goes AxCrazy when he thinks Arnold is stealing his girl and tries to attack him.
** Helga is jealous of Lila to the point that she is willing to ''strangle Lila with her bare hands''. (She mimes this to Lila.)
* ''WesternAnimation/FostersHomeForImaginaryFriends'': One episode featured a newcomer called Berry. Berry is initially sweet and polite, but once she develops a crush on Bloo, she turns into a psychotic {{Yandere}} who continually tries to get rid of Bloo's best friend Mac so that she can have Bloo to herself. Worst of all, Bloo barely even notices her and constantly forgets her name.
* [[PlayingWithATrope Played with]] in ''WesternAnimation/GravityFalls''--[[{{Yandere}} Gideon]] is obsessed with [[{{Cloudcuckoolander}} Mabel]], who gets her brother [[AdorablyPrecociousChild Dipper]] to break up with him on her behalf. [[FriendVersusLover Perceiving Dipper as the problem]], Gideon lures him into a trap and tries to kill him.
* In the backstory of ''WesternAnimation/TeenageMutantNinjaTurtles2012'', Shredder attempted to kill Splinter over Tang Shen. However, Shen intervened and took the blow intended for Splinter. Shredder [[NeverMyFault blames Splinter like this, just as he does with essentially everything else]].
* A FoeYay version appears in the ''WesternAnimation/BatmanTheAnimatedSeries'' episode "Mad Love". SelfDemonstrating/HarleyQuinn thinks Batman is interfering in [[MadLove her relationship]] with SelfDemonstrating/TheJoker, so she becomes determined to kill Batman herself, thinking that'll fix everything.

[[folder:Real Life]]
* Cesare and Lucrezia Borgia were widely rumored to [[BrotherSisterIncest have been lovers]] in an example of DidTheyOrDidntThey? of epic proportions. Cesare was believed to be extremely jealous of Lucrezia's second husband, Alfonso of Aragon, both for Alfonso's good looks (Cesare's face had been scarred by syphilis) and because Lucrezia seemed genuinely happy with her husband. Cesare had Alfonso attacked by his men in the middle of the night, but Alfonso survived. His men retaliated by shooting arrows at Cesare one day while he was in his garden. Cesare shortly thereafter had Alfonso strangled in his recovery room. Lucrezia was said to be devastated. It should be noted that Lucrezia and Alfonso's marriage was quickly becoming a useless alliance, which also probably had something to do with Cesare's motives.
* Peter the Great infamously had his wife, Catherine I's, lover beheaded. He had the head preserved in a jar of alcohol which [[DisproportionateRetribution he forced Catherine to keep in her bedroom until his death]].
* Isabella of France and her lover Roger Mortimer led an invasion against Isabella's incompetent husband, Edward II of England, who was eventually forced to abdicate in favor of his and Isabella's son. During their coup she made sure that Edward's favorite and rumored lover Hugh Despenser was brutally executed as payback for trying to drive a wedge between husband and wife. And when Edward was later murdered, Isabella and Mortimer were thought to be responsible. Once Isabella's son came of age and became King Edward III, he had Mortimer executed on fourteen counts of treason, including the murder of Edward's father. It's not proven whether they actually committed murder or not; some scholars hold that Edward's death was not murder at all.
* Henry Stuart aka Lord Darnley, the cousin and consort of UsefulNotes/MaryOfScotland, thought that his wife was just ''too'' close to her secretary, David Rizzio. So he and other nobles interrupted a reunion between them and stabbed Rizzio ''56 times'' in front of the pregnant Queen, despite her pleas and a failed GoThroughMe.