The first assumption in a relationship described as a Love Triangle is that someone has got to go. There is a lot of good drama/comedy in that little conundrum. Even if the writer chooses to challenge that assumption, there will be some pretty tricky footwork required to make it all come out to a resolution. Here are the possible triangles. Put one to work. Note: These are all point-in-time snapshots. Could be the situation at the beginning or it could be after some story has gone by. These are often used to construct different faces of Love Polyhedra.
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1. Alice wants both Bob and Charlie, but cannot decide which. Both are unrequited or their wishes are unimportant at this point.
- The classic Betty and Veronica trope. See that page for details.
2. Alice wants Bob, Bob wants Claire, and Claire wants Alice. Sometimes referred to as a Bizarre Love Triangle, after the New Order song. It can involve as many people as you like, turning it into a square, pentagon or more, but ultimately the love remains unrequited.
Anime and Manga
- The manga Girl×Girl×Boy has one of these triangles most of the way through. Although it later turns out to have by type 4 all along.
- Natalia (Belarus), Ivan (Russia) and Toris (Lithuania) from Axis Powers Hetalia. With a twist: Belarus and Russia are siblings. Completely, utterly, and hilariously insane siblings. Poor Lithuania...
- Juri, Shiori and Ruka in Revolutionary Girl Utena.
- In Sgt. Frog, Ms. Furbottom loves Giroro, Giroro loves Natsume, and Natsume loves Ms. Furbottom.
- Strangers in Paradise, most of the time. David longs for Katchoo, Katchoo for Francine, and Francine for David.
- The 1994 movie Threesome uses this setup with two men and a woman.
- She's The Man: Viola becomes Sebastian, and falls in love with Duke. Duke then falls in love with Olivia, and Olivia falls in love with Viola disguised as Sebastian. There's a bit more to it than that - the real Sebastian, Viola's brother, is dating Monique so she hates Olivia, but Olivia goes out with Duke to make Viola jealous. Coupled with the reason why Viola crossdresses in the first place, it's also a Love Dodecahedron.
- The main three characters in The Rules of Attraction, though they also each have several side-flings.
- An episode of The Thin Blue Line uses this plot:
Habib: So you're telling me that Kevin fancies me, I fancy you, and you fancy Kevin?
- Udo Lindenberg from Berlin made a song about one: A conductor loves a soprano, she loves a dancer from the ballett, who loves the conductor.
- A four-part version is described in the They Might Be Giants song "Withered Hope", whose characters are (in typical fashion for the band) rather abstract: a "Very Sad Sack", the Withered Hope of the title, a picture of a crook, and a motorcycle.
3.The classic love war set up. Bob and Charlie want Alice. Alice is neutral toward, or not initially thinking in romantic terms of Bob and Charlie, or thinking about them at all. Not a bad situation to be in, if you are Alice, though obviously a bit less so for Bob and Charlie. Some Alices will be tempted to see if there is any Type 7 (below) potential in the situation.
Anime and Manga
- The manga Ichiroh! gives us 'a' as main character Nanako with 'b' as her childhood friend Shino and 'c' as her brother. Nanako is painfully aware of their feelings, but can't seem to discourage either of them, leaving the two to fight between each other for her.
- Ren (A) and his two best friends (a guy and a girl) in Kaze no Stigma, who are quite jealous of each other.
- Both versions of Mai-HiME contain type 3 triangles involving the main character(s):
- (anime) Reito (B) and Yuuichi (C) are both attracted to Mai (A).
- (manga) Yuuichi (A) is sought after by Mai (B) and Natsuki (C), since he is the "Key" to both of their HiME powers. Eventually, Shiho also tries to claim him.
- In the Mazinger trilogy (Mazinger Z, Great Mazinger, UFO Robo Grendizer), Sayaka and Maria both want The Hero (The Lancer in the third series) and Chaste Hero Kouji Kabuto, who is usually too busy to think about romance (and is usually too dense to notice).
- In Axis Powers Hetalia, Greece and Turkey both like Japan who backs out of telling them which one he prefers. Word of God even defines their relationships as Greece —> Japan <— Turkey. However, considering that the ratio of Ship Tease is heavily skewed towards Greece and Japan, many fans see this as more of a Type 4 triangle with Turkey at A, Japan at B, and Greece at C.
- In Naruto in Part I, the two tsunderes Sakura and Ino (B and C) both like Sasuke (A), who shows no romantic interest in either. Both Naruto and Lee (B and C) have feelings for Sakura, who is in love with Sasuke and thus strongly rejects their initial advances.
- In Digimon, Davis and TK are in love with Kari, or at least Davis is. Many fans support either, and the pairings have been known as dakari (for Davis) and takari (for TK). It is unclear who her husband is at the end of Season 2, or if it even either of the two.
- In Mai-Otome, Arika(B) and Nina(C) over Sergay (A).
- In Gakuen Babysitters, Inomata and Ushimaru have crushes on Ryuuichi.
- A developing case in Attack on Titan, with both Ymir and Reiner having feelings for Krista. The former is officially stated to be in love with her, while the later has a crush that may or may not be serious. Krista, for her part, hasn't shown that she considers either one of them as anything more than a friend.
- This type of triangle pops in Akuma no Riddle, with Chitaru Namatame at A, Hitsugi Kirigaya at B, and Shiena Kenmochi at C. It end with all three of them dying
- During the first half of Fruits Basket, Yuki and Kyo both develop feelings for Tohru, and subconsciously bicker over her time and attention. An interesting take on the trope though, Tohru's friend Saki notes that they both have too much chaos in their hearts to have room for love, so they remain unaware of their true feelings for her for a long time (while they sift through all the issues caused by their abusive upbringings). By the time the dust settles, the triangle is resolved when Yuki realizes that he had wanted a "mother" figure in Tohru note so he happily stands aside so she can end up with Kyo.
- Some of the sub triangles of School Rumble. Harima (A) is too focused in his love with Tenma and is unaware of Eri (B) and Yakumo (C) feelings. Eri has some kind of rivarly with Yakuno, but its a friendly one.
- In Ancient Languages, Elhael and Glorfindel compete for access to Lyla.
- Evangelion 303: Kaworu/Rei/Saburo are a Type 3: Saburo and Rei both want Kaworu, but he wants to be single for now (and he wants nothing with Saburo).
- See Sabu: Osue is at 'a', in the sights of both Sabu and Eiji, two friends from childhood.
- Paint Your Wagon starts off as this, with Ben winning Elizabeth at auction but with the Stranger longing for her as well. Rectified temporarily when Elizabeth proposes turning this into a Type 7.
- Star Wars appears to set up this scenario with both Han and Luke being potentially interested in Leia, but later it becomes apparent that it's Han she has feelings for and Luke is her long-lost brother.
- Anne (A), in Anne of Avonlea, with Chalie Sloane (B) and Gilbert Bylthe(C) — although it is hinted that she was in denial of a type 4 towards Gilbert all along, or even a type 7 with Roy and Gilbert in Anne of the Island.
- Smallville middle season two: Both Chloe and Lana want Clark, who is with someone else.
- The Best Years has both Devon and Trent in love with Samantha in the first season. This triangle is repeated in the second season with Rich and Jake.
- From Season 3 of Angel, Fred is A, Wesley and Gunn are B and C.
- Peanuts starts here. Peppermint Patty and Marcie are both shown interested in Charlie Brown. Chuck/Charles isn't quite noticing of them...
- Most noticeable of late is the situation in which Daniel Bryan found himself with Monday Night RAW's resident twin tag-team teases/terrors, the Bella Twins (until they found him making out with Gail Kim — they didn't take that well).
- This is how Touhou fanon portrays Marisa's effect on pretty much every other character she meets, but especially so with Patchouli and Alice. Marisa steals the precious things.
- Final Fantasy VII Tifa and Aerith both have feelings for Cloud. But he is unaware of this fact. Events in the game clear matters up by the end. One death and one Relationship Upgrade later.
- Mega Man Legends: Volnutt is A, with Roll Caskett at B and Tron Bonne at C.
- Mega Man Star Force: Both Luna Platz and Sonia Strumm have feelings for Geo Stelar, who may or may not like them back. It is never resolved by the end, so it's all open to debate.
- Girl Genius
- Agatha (A), Gil (B), and Tarvek (C). Bit of a cross with Type 1, as Agatha likes both of them, and oscillates between which one she wants, but has not committed either way. An added twist is that Gil and Tarvek are each aware of the other, and hate each other (for reasons unrelated to Agatha).
- Agatha and Gil have started to express their feelings for each other, making this somewhat type four-ish (With Tarvek as A and Agatha at B).
- Castle Heterodyne clearly supports type 7, and if Gil and Tarvek resolve their issues, it would go to a type 8.
- Trudy and Ki of General Protection Fault are both attracted to Nick, who is struggling with his feelings for the two of them and his own attitudes toward relationships. After Nick and Ki get together, this turns into a Type 4.
- In Homestuck, both WV and AR are infatuated with PM, but PM either is oblivious/doesn't have a preference.
- In the ABC/Disney version of Doug. Patti (A) is unaware of Doug's (B) feelings and the triangle is completed when Guy (C) debuts (he falls in love with Patti pretty quickly). Both want Patti both have some kind of rivalry and Patti has a good friendship with both. The triangle is dissolved when Guy gives up, but is uncertain if Doug an Patti ended together.
4. Alice wants Bob, who is already in a relationship with Claire. Bob is unaware/neutral (leaving Alice as a Hopeless Suitor), or is aware of the interest and can't/won't reciprocate (leaving Alice in the "friend zone"). As the most complicated set of relations which is compatible with both monogamy and heterosexuality, this is very common.
Anime and Manga
- Saki longing for Kurumi who is devoted to Nakahito in Steel Angel Kurumi.
- Yuzuru Narazaki (A), Yukari Fujimaru (B), and Ryo Katsuragi (C) in Penguin Revolution, first professionally (Yukari is Ryo's manager, and Yuzuru stages a very determined campaign to convince her to become his manager instead) and then romantically, with the added twist that as far as Yuzuru knows, Yukari is a man.
- Strawberry Panic! centers on two of these triangles. The first consists of Tamao, Nagisa, and Shizuma as A, B, and C respectively; the second is Yaya, Hikari, and Amane.
- In Ranma ½, (A) Ryoga Hibiki wants (B) Akane Tendo, who is, more or less, engaged to (C) Ranma Saotome. Akane doesn't seem to notice Ryoga's crush on her and remains romantically interested in her fiancée. In fact since so many people are interested in either Ranma or Akane, "a" is where most of the characters in the Love Dodecahedron are at baseline, with some additional complications thrown in due to the existence of characters e, f or g.
- Future GPX Cyber Formula has Randoll (A), Asuka (B), and Hayato (C). Randoll wants Asuka, but she doesn't return his affections and instead shows her affections to Hayato towards the end of the TV series. In fact, Randoll promised Asuka that if he wins the Spanish race, he gets her kiss. Needless to say, it doesn't work.
- In Kimagure Orange Road, Hikaru Hiyama (A) wants her "darling," Kyosuke Kasuga (B), who thinks of her as a younger friend or a complete annoyance (depending on the situation). Kyosuke, in turn, is very interested in the cool and standoff-ish Madoka Ayukawa (C), the first girl he met when he moved to his current neighborhood. On the surface, this is appears to be a type 5 case, except that Madoka feels the same about Kyosuke, she just doesn't always show it.
- Ai Yori Aoshi, with Tina, Kaoru, and Aoi at a, b, and c, respectively. Complicated by the fact that Tina and Aoi like and respect each other.
- In the Mai-HiME anime, Takeda is A, with unrequited feelings toward Natsuki at B, who is (implied to eventually return Shizuru's feelings). In the ending, despite Mai and Yuuichi becoming a couple, Reito and Shiho are still persisting in their attempts to get together wtih the partner they desire.
- In Nogizaka Haruka no Himitsu, Shiina is A to Yuuto's B and Haruka's C. At least she gets to spend one episode largely with him in episode 7 of Season 2.
- In Freezing, Rana is A to Kazuya's B, and Satellizer's C. Not that it stops Rana from trying to get him anyway.
- A rather twisted variation shows up in Full Metal Panic!, with Gauron at (A), Sousuke at (B), and Kaname at (C). Gauron is a creepy bastard who is in love with Sousuke's carnage and is quite the yandere to boot. Sousuke, for his part, wants nothing to do with this guy, and would much prefer he die or leave him the hell alone.
- A less disturbing one by the end of The Second Raid: Sousuke appears to have finally embraced his feelings for Kaname, while patching things up with, but not necessarily entering into a relationship with, Tessa.
- A similarly twisted version occurs in Clover, with Bols at A, Kazuhiko at B, and Ora at C.
- In Cardcaptor Sakura, Tomoyo (A) is in love with Sakura (B). Sakura and Syaoran (C) both have crushes on each other. Because of I Want My Beloved to Be Happy, Tomoyo takes it on herself to get the two of them together.
- 07-Ghost: Vanessa (A) loves, and is politically married to King Krom (B). Krom's true love is Millea (C), whom he made a concubine. Teito is Millea's mother.
- Later on in the manga we find out Millea is at the center of a love triangle as well: King Wolf Barsburg (A) has long been in love with Millea (B) who, while still living in Barsburg, fell in love with Krom (c), resulting in the love triangle above.
- Fist of the North Star: Kenshiro, Shin, and Yuria have this relationship, with Shin desiring Yuria but being unable to have her due to her and Ken being betrothed. This eventually leads to Shin (with a little prodding from Jagi) deciding to kill Ken and take Yuria for himself.
- An interesting case turns up in Fruits Basket. After his growth spurt, Momiji decides to confess his love for Tohru, but by that point she has become aware of her romantic feelings for Kyo, who reciprocates. Seeing how happy they are together, Momiji decides not to confess after all and secretly wishes them well.
- Mangaka Yuu Watase is absolutely in love with this trope. Nearly all of her works involve the heroine (B) first meeting and inevitably becoming part of an Official Couple with the main male lead (C), while the next most important male character (A) (and usually many others) becomes a Hopeless Suitor to her. (Even if he does step aside so she can be happy and/or enters another relationship, he will never quite get over her.)
- Fushigi Yuugi: Hotohori (A) falls for Miyaka (B), who enters a relationship with Tamahome (C).
- Ayashi no Ceres: Yuuhi (A) falls for Aya (B), who instantly falls for and eventually gets together with Toya (C).
- Alice19th: Frey (A) falls for Alice (B), who has reciprocated feelings for and eventually gets together with Kyo (C).
- The most likely theories concerning Ninjette (A), Thugboy (B), and Empowered (C) is that they make up type 4 or type 6. The lech decorating Emp's coffee table apparently wants it to eventually end up as type 8, but no luck so far.
- Quantum and Woody has this with Eric/Quantum (A) carrying a torch for Amy Fishbein (B), who's got the hots for Woody (C). Woody is indifferent to Amy, but knows that Eric's infatuation with her has messed him up a bit.
Woody: "The only reason I'm even wearing this stupid costume is because you couldn't score with Amy Fishbein!"
- Children of an Elder God: Shinji, Asuka and Rei's relationship is a Type 4: Rei likes Shinji but Shinji likes Asuka who likes him back in turn.
- Evangelion 303: Shinji/Asuka/Jessika are a Type 4: Shinji and Asuka are lovers, and Jessika loves Asuka, but Asuka thinks of Jessika like a friend.
- HERZ: Shinji/Asuka/Kurumi is a Type 4: Shinji and Asuka are Happily Married. Kurumi likes Shinji but her feelings are unrequited.
- In Naruto Veangance Revelaitons, Naruto (A) still loves Sakura (B) and resents Ronan (C) for stealing her away. Sakura is quick to point out how much better Ronan is than Naruto, but is willing to have sex with him on a whim.
- The movies Unlawful Entry and Indecent Proposal.
- Brand Upon the Brain gets bonus points for diagramming this onscreen. Guy (a) and Sis (c) fall in love with Chance (b), and also with Wendy, (b in another triangle that has the same a and c.) The individual they think is Chance is actually Wendy in drag, so both triangles resolve in Sis's favor. (Guy faints when he realizes precisely what's going on.)
- The controversial film The Night Porter by Liliana Cavani. Ex-Nazi officer Max (B) has a very visceral attraction with ex-inmate Lucia (C) (never mind her husband, who isn't in the picture). (A) comes as a homosexual ex-SS colleague of Max, whose unrequited love eventually drives him to murder.
- While The Hunger Games books keeps it vague who Katniss truly has feelings for between Peeta and Gale until the third book, the films makes it pretty explicit that she's in love with Peeta.
- Severus Snape, Lily Evans, and James Potter ended up this way, as revealed in Harry Potter and the Deathly Hallows. Also, for a short time, Harry (A) pining over Ginny (B) who is "with" Dean (C).
- This happens several times in the Tolkien legendarium: Éowyn, Aragorn, and Arwen in Lord of the Rings, Brandir, Niënor, and Túrin in The Children of Húrin, Celebrimbor, Galadriel, and Celeborn in Unfinished Tales, and both Celegorm, Lúthien, and Beren and Maeglin, Idril, and Tuor in The Silmarillion.
- Eponine, Marius, and Cosette in Les Misérables.
- Thai's epic poem, Khun Chang Khun Phaen, has Khun Chang (A) in love with Wanthong (B), who is already a fiancée of Khun Phaen (C), and Khun Phaen is The Casanova who practically loves every beautiful girl he comes across, including Wanthong, but due to the multiple events of kidnapping and husband switching, the relationship of the three turns into type 7. Tragically, Wanthong ends up getting beheaded for not be able to decide who she really wants to live with.
- In Arrow's Fall of the Heralds of Valdemar series, this is what Dirk thinks is occurring in the Love Triangle between himself, Kris, and Talia. Of course, he and Talia are really lifebonded but are in denial about it, while Kris and Talia did in fact have an affair that is now over. Add in a healthy dose of Poor Communication Kills and Drowning My Sorrows, and it takes Kris' actual death, Talia's near-death, and something akin to divine intervention to sort things out.
- In Tales of Kolmar, Idai longed for Akhor and confessed it as soon as he was of age, but he didn't want her. Later Akhor and Lanen fell for each other, and Idai had to swallow her jealousy.
- In The Belgariad series, Silk had feelings for Porenn...who was a) not interested, and b) married to his uncle. He gets over it eventually.
- In The Heroes of Olympus everyone thought there was a triangle with Nico as A, Annabeth as B and Percy as C. Turns out Nico is (or was) actually in love with Percy, who is in a happy relationship with Annabeth.
- In Warrior Cats:
- Thrushpelt loves Bluestar, who only liked him as a friend. She and Oakheart fall for each other instead. Thrushpelt accepts it, though: once Bluestar gets pregnant with Oakheart's kits, Thrushpelt says that he understands and offers to claim her kits as his own if she can't share who the real father is (which the Clan would believe, knowing of their friendship and his feelings for her.)
- Happens twice to poor Gray Wing. First he likes Bright Stream, who becomes mates with Gray Wing's brother Clear Sky instead. Later on, some time after Bright Stream's death, Gray Wing meets Storm and falls for her - a lot more strongly than he had with Bright Stream. She and Clear Sky end up falling in love at first sight.
- Game of Thrones: Brienne of Tarth is in love with King Renly Baratheon, but he and Ser Loras Tyrell have already been together for years, and she doesn't believe in any of the gossip surrounding them. While Renly is aware that Brienne is very loyal to him, it's unclear on the show if he ever suspected that she fancied him.
- Smallville season one: Lana is dating Whitney, Clark is crazy over Lana.
- Late season one: Chloe is in a relationship with Clark, Pete has a secret crush on her.
- Late season two: Lana is having a relationship with Clark, but Chloe is very, very far from getting over Clark. This situation is more or less what the trio find themselves in half of the later seasons, although Lana and Clark has always been rocky. Lex and Lionel love messing with Chloe over this.
- Season four: Lana is with Jason, Clark is still crazy over her.
- Late season five: Lana gets way too close to Lex, Clark is still crazy over her.
- Season six: Lana gets over Lex but not vise versa, Clark is still crazy over Lana but she returns the feelings.
- Season seven: Clark and Lana are together, Chloe is still not completely over Clark.
- Season eight: Chloe and Jimmy are getting married, Davis is attracted to Chloe. Moves towards type 7. Yeah, Smallville has really messy relationships.
- In Glee, Dave Karofsky is interested in Kurt, who is already in a relationship with Blaine. In addition, Sebastian has feelings for Blaine, setting up another triangle with Blaine as B and Kurt as C.
- Arrested Development: Michael is A, Marta is B, GOB is C. Later became type 7 (and briefly type 5) when Marta returned Michael's feelings, but not long afterwards she dumped both of them when they got in a fight over her.
- Frasier, for much of its run, with Niles at A, Daphne at B, and a series of Cs.
- Pushing Daisies, with Olive at A, Ned at B and Chuck at C.
- iCarly season four finale sets up like this. Sam wants Freddie, who shares an existing, complicated double sided Just Friends relationship with Carly. Freddie is is aware of Sam's interest since she kissed him, but there is nothing to suggest he likes Sam back.
- EastEnders's triangle between Syed, Christian, and Amira fits here, with Christian at A, Syed at B, and the oblivious Amira at C.
- Torchwood: By series 2 and 3, Gwen is at A, Jack is at B, and Ianto is at C. While Jack is quite aware of Gwen's feelings for him and ambiguously returns them, he gently pushes her toward a normal relationship with her fiance ( and later husband) Rhys. Also, while Jack and Ianto's relationship is blatantly physical, the emotional aspects are brushed over until series 3.
- Noah's Arc: Three examples of this type of triangle: The first is Trey, Alex, and Guy, with Guy pining after Trey who is in a relationship with Alex. The second is Noah, Wade, and Ricky (it is revealed in the movie that Ricky has been in love with Noah for some time, while Noah is happily with Wade). Noah, Wade, and Baby Gat have a similar dynamic.
- Buffy the Vampire Slayer: In season 1, Xander is in love with Buffy, who is in a relationship with Angel. In the Season 8 comics, Buffy starts having feelings for Xander, who is dating her sister Dawn. Also, in Season 5, Spike figures out he's in love with Buffy while she's still dating Riley.
- Angel: In season 3, both Wesley and Gunn fall for Fred, and she falls for Gunn.
- Babylon 5: Sheridan and Delenn developed a committed relationship, but Delenn's faithful aide Lennier was secretly in love with her, which he tried to hide for the sake of her happiness. Delenn struggled with this because Lennier was very dear to her and she wanted him to be happy as well, but her love for him was more familial. In the end, nothing changed, Lennier apparently resigned himself to a state of The Mourning After, and their friendship suffered.
- Kamen Rider Gaim Micchy is A, Mai is B, and Kouta is C; they're not actually a couple, but Everyone Can See It. Unfortunately, as time goes on, Micchy begins Sliding Down The Slippery Slope due to his jealousy, before pulling a full Face–Heel Turn by shooting Kouta in the back.
- The 'Faking It triangle between Amy (A), Karma (B), and Liam (C) is somewhere between this and a type 7, depending on where Karma's sexuality ends up.
- How I Met Your Mother:
- Scooter still has feelings for Lily who is already married with Marshall.
- Midway in Season 1, Robin realized that she has feelings for Ted who is in a relationship with Victoria.
- In Season 6, Robin is jealous with Nora's relationship with Barney.
- Seasons 8 & 9 show that Ted is still in love with Robin who is already engaged and later, married with Barney.
- In the series finale, after her divorce with Barney, Robin realized again that she has feelings with Ted who is already in love with the titular Mother.
- Jessie's Girl by Rick Springfield.
- A much darker version of this is Delain's "I Want You" - which starts out seeming like a typical unrequited love song, but it gradually becomes clear the narrator is a dangerously obsessed stalker and ends with If I Can't Have You (even including that phrase verbatim).
- Cyrano de Bergerac is a classic (and tragic) example: Cyrano (A) is in love with Roxane (B), who in turn loves and is loved by Christian (C). The ugly Cyrano wants Roxane to be happy above all else, so he agrees to protect Christian as they go to war, while lending his poetry and wit to Christian to ensure he'll win Roxane's heart. It gets a bit more complicated by the end, but this arrangement is the basic premise.
- Shakespeare's A Midsummer Night's Dream, Demetrius is A, Hermia is B, Lysander is C.
- Jean-Paul Sartre's play No Exit: Garcin and Estelle want each other, but Ines, who wants Estelle, keeps preventing this.
- Every Gilbert and Sullivan opera except Trial By Jury, Princess Ida, and The Gondoliers uses this at least once.
- Romeo and Juliet of course has Paris (A), Juliet (B) and Romeo (C).
- Mega Man Battle Network does this with Guts Man.EXE (A), Roll.EXE (B), and Mega Man.EXE (C). Their netops, however, are a type 5.
- Final Fantasy IV: Kain (A) is fond of Rosa (B), but she and Cecil (C) are in love with each other.
- In Kingdom Hearts (more prominently in the first episode but possibly in the others as well) Riku (A) has feelings for Kairi (B) but she and Sora (C) are hinted to be in love with each other.
- In Professor Layton and the Unwound Future, Layton (C) is revealed to have been in a loving relationship back in college with Claire (B), who died in an accident. At the time of her death, there were not one but two (A) figures in this quadrangle. One was her boss (A1), and it's implied that she was aware of his feelings but didn't return them, a fact which he reluctantly accepted; the other (A2) was a fellow student at their university, and there's no indication that she even knew he existed. A2 took her love for Layton much harder, and it became his Start of Darkness.
- In Warcraft, Illidan (A) is in love with Tyrande (B), but she loves Malfurion (C), and they officially marry after the Stormrage novel. That said, Illidan is already dead at that point.
- X-Change Alternative 2 has a fantastically bizarre version of this. Yuuki (a guy) has his body accidentally swapped with Sayuri (a girl). In Sayuri's body, Yuuki realizes that he loves Sayuri, so he decides to go to confess but before he gets to confess Sayuri tells him that she has something important to tell him. And then declares that she loves Mine (a girl), thinks of having her body swapped with a guy a gift by god and is going to confess to Mine. He of course decides to support her decision. When Sayuri confesses to Mine, her response clearly declares that Mine loves Yuuki. So all in all, Type 2 became Type 4. Oh and the storyline also involves Type 2 (two of them) AND Type 5. In one storyline you'll get to see 3 types of love triangles.
- It is clear in the first game that Jak (C) and Keira (B) are in a relationship, yet Daxter (A) still tries to win Keira's heart. This is no longer true starting in the second game, with the introduction of Tess.
- Starting in Jak II, we also get Ashelin (A), who's shown in a few cutscenes to harbor romantic feelings towards Jak (B). Although they (presumably) kiss at the end of Jak 3, Jak decides to remain with Keira (C), in the end, while Ashelin starts a relationship with Torn.
- Xenoblade has Melia (A) falling for Shulk (B) after he fetched water ether crystals by himself to heal her after she passed out in her introduction. At first it seems like it could work despite Shulk being Oblivious to Love, but the return of Fiora (C) resulted in this.
- In Diablo III Lyndon and his brother Edlin both fell in love with the same woman, Rea. Rea chose Edlin and the two married. Lyndon never admitted his feelings to Edlin and chose to step aside gracefully. Then Edlin gets murdered in his cell in Westmarch and Rea is revealed to have done it. But why?
- In don't take it personally babe, it just ain't your story, Alpha Bitch Taylor wants her ex-boyfriend Nolan back, but he has started a relationship with Akira. In true Alpha Bitch fashion, Taylor, already a homophobe, starts harassing Akira.
- Justin, Elliot, and Sarah in El Goonish Shive. Justin's gay, Elliot's not. Earlier in El Goonish Shive, Nanase was in Sarah's place, with Sarah being in Justin's, and Elliot thinking Sarah's attraction to him isn't serious, so he doesn't respond for fear of damaging their friendship until the issue is forced.
- In Faux Pas, both Cindy and Dusk are in love (or lust) with Randy, who believes that Dusk is more predatory than loving.
- College Roomies from Hell!!!: April is A, Mike and Marsha are B and C. Hilarity and bloodshed ensue. After Dave gets together with Blue and Margaret's Green-Eyed Epiphany sets in, another one of these develops, with Margaret at A, Dave at B, and Blue at C.
- Misfile had this for a short while in the story with Ash (B), Emily (A), and Missi (C). Heavily disputed that is will eventually have Emily as C and Missi as A.
- Nina and Ed are most certainly into one another in Between Failures. Reggie is hot on Nina himself, but neither Nina nor Ed can stand him, because he's a narcissistic twit who seems to think taking responsibility for your own fuckups is optional.
- In General Protection Fault, Ki and Trudy both are in love with Nick, but Nick eventually decides on Ki. Fooker's relationship with Sharon, having just rekindled, is put on hold when he is forced to work overseas to rebuild his cover, and while Maddie O'Hara develops feelings for him during that time, his feelings remain for Sharon.
- Survival of the Fittest, Imraan Al-Hariq (A) has a crush on Jessie Anderson (B), who is in a relationship with Daniel Kensrue (C).
- Red vs. Blue has Caboose, Sheila (the tank), and Lopez (the robot mechanic). Caboose (A) loves Sheila (B), but she and Lopez (C) at least like each other more. She's fairly neutral toward Caboose, though, and the two are still friends.
- Ron (A) wants Kim Possible (B), who is already in a relationship with Erik (C). Ron won't make Kim aware of his feelings with Erik still around because he is a loser compared to 'perfect' Erik, and Kim is too happy with Erik to think about Ron.
- Disney's Beauty and the Beast: Gaston is A, Belle is B, and the Beast is C.
- On Total Drama Island, Cody (A) likes Gwen (B), who is pretty much destined from episode 1 to be with Trent (C). Cody actually didn't realize this despite obvious clues, but decided to help set them up when he finally did.
- On Clone High, Joan Of Arc is A, Abe Lincoln is B, and Cleopatra is C. This is addressed by the narrator in the opening to episode 8.
- On Gravity Falls, Dipper has a Precocious Crush on Wendy, who is dating Robbie.
- An Extremely Goofy Movie has Bobby as A, Beret Girl as B, and PJ as C, though in this case Beret Girl rejected Bobby before asking out PJ.
- The Secret Show: Victor Volt is A, Anita Knight is B, and Alphonse is C.
- In Over the Garden Wall, Wirt likes Sara, and though he can't seem to see it, she's implied to like him too. Jason Funderberker also likes Sara, and Wirt is convinced that he has no chance against him, though in reality Sara seems indifferent to him.
- In Steven Universe, back when Rose Quartz was alive, Pearl (A) was deeply in love with her leader, Rose Quartz (B), but Rose didn't seem to reciprocate her feelings and instead started a romance with a human, Greg Universe (C).
5. Alice loves Bob, but Bob loves Claire. Claire doesn't have feelings for either. Alice might try persuading Bob to give up on Claire. If Alice is Axe Crazy (or otherwise extremely jealous), she might attempt to Murder the Hypotenuse. Alternatively, Alice might just want her beloved to be happy, and try to set Claire up with Bob. This is the smallest situation directly involving at least three characters where All Love Is Unrequited. This can potentially involve more than three people, with Claire having feelings for David, David having feelings for Emily, and so forth (perhaps even looping around to Zeke loving Alice in a dodecahedral version of Type 2.)
Anime and Manga
- Four parties involved in Kannazuki no Miko: Otoha adores Chikane, who wants to protect Himeko, who has eyes for Souma.
- In Slam Dunk, Sakuragi is in love with Haruko, who is in love with Rukawa (who doesn't seems to be interested in anything but basketball).
- In Naruto Hinata has feelings for Naruto, Naruto and Lee have feelings for Sakura, and Sakura and Ino have feelings for Sasuke, who cares more about revenge than romance. In Kakashi Gaiden, Obito is in love with Rin, but never told her, and Rin is in love with Kakashi, who states he doesn't deserve her for abandoning her. In the end Naruto gets over his feelings for Sakura and falls in love with Hinata, Sasuke eventually comes around and reciprocate Sakura's feelings, and Ino pairs up with Sai.
- In Yu-Gi-Oh! 5D's, there's a Gender Flipped version with Trudge, who likes Mina, who likes Jack, who likes Carly.
- In I'm Gonna Be an Angel! the main triangle involves Noelle who loves Yuusuke, who loves Natsumi, who obsesses over her dead brother. Also, on the villain side, Muse loves Eros, who loves Silky, who... fixates on Noelle. And a bit more complicated one, Raphael loves Mikael who is interested in Noelle, who loves Yuusuke. Later subverted when it turns out Mikael was in love with Raphael all along.
- In Sailor Moon R, Usagi and Mamoru are in love. Prince Diamond is blinded by his very Yandere love for Usagi, which makes Emerald jealous as she is in love with Diamond. Furthermore, it is hinted Sapphire was in love with Emerald, given his suspicions about Wiseman causing her death. Although Prizma and Sapphire used to be an item.
- In Magical × Miracle, in the last chapter, it is revealed that Vaith has a crush on General Lenolora, who has a Vitriolic Best Buds version of an Patient Childhood Love Interest-type relationship with Yue, but while the friendship is mutual, the love is (probably) unrequited, given Yue's Heroic BSOD at the news.
- In the Mai-HiME manga, Takeda loves Natsuki, who hardly even notices him and is in love with Yuuichi instead.
- In Hekikai No Ai ON, Sheila is in love with Tatsuya who was the only one aside Ariel that doesn't treat her like crap but he rejects her because he's already in love with Action Girl Seine who does not correspond to his feelings. Did I mention the two girls are enemies?
- Canaan has a pretty tragic setup involving this among the villains. Cummings (A) is in love with Liang Qi (B), but Liang Qi treats Cummings like crap and only has eyes for her boss and Onee-sama Alphard (C), who she is Yandere for in a big way. Alphard, meanwhile, couldn't care less about either of them, and harbors a bit of Foe Yay toward Canaan (the D in this Love Dodecahedron), which Liang Qi murderously despises Canaan for. Canaan, for her part, primarily sees Alphard as an enemy, and the closest person she has to an actual Love Interest (if even that) is Maria (E).
- In Attack on Titan, Jean's attraction to Mikasa fuels much of the tension he has with Eren. Eren, for his part, is utterly oblivious to Mikasa's feelings for him and may in turn have feelings for Annie. Mikasa even calls him out of this, demanding to know if he has "special feelings" for Annie.
- Queen's Blade: Hide & Seek has an incestuous triangle between The Vance Sisters. The eldest daughter, Claudette, is in love with her youngest sister, Elina. Elina is in love with/lusts after her middle stster, Leina, but also has closeted feelings for her eldest sister, Claudette. Leina is in love with neither of them, but supports Elina and Claudette's feelings for each other.
- In Tokyo Ghoul:Re, Kanae is the Ignored Enamored Underling to his cousin, Tsukiyama. In turn, Tsukiyama has spent the last three years completely wrapped up in Kaneki and is completely oblivious to Kanae's feelings for him. Kaneki has become Amnesiac Hero Sasaki, and doesn't recognize Tsukiyama at all when they reunite. This results in various attempts by Kanae to Murder the Hypotenuse, and Eto showing up to exploit his increasingly unstable emotional state for her own purposes.
- There are a lot of examples In School Rumble if you decompose the Dodecahedron into love triangles. For example: Harima (A) wants Tenma (B) who wants Karasuma (C).
- The Batman Adventures: Type 5: Harley Quinn is in Mad Love with The Joker, but The Joker has Foe Yay with Batman. Batman doesn't have feelings for either. Harley tried persuading The Joker to just shoot Batman. It didn't work, so Harley being an Axe Crazy Clingy Jealous Girl attempts to Murder the Hypotenuse (later to be adapted to the TV show).
- In this Saki fan work, it's suggested that Miharu has a crush on Kana, who has a crush on Mihoko, who has a crush on Hisa.
- In Bringing Me To Life a The Matrix Slashfic there's Cypher whose in love with Apoc, while Apoc has a crush on Neo and then Cypher develops a crush on Neo, Neo, meanwhile, doesn't notice either of them.
- Commonly seen in situations where A helps B to seduce C whilst either harbouring a crush all the time or developing one as the plot unfolds, ala School Days or American Pie 2.
- In Carefree (1938), Stephen (A) loves Amanda (B), who loves Tony (C). Eventually, Tony returns Amanda's feelings and it turns into a Type 4.
- Some Kind of Wonderful has this sort of triangle with Watts as A, Keith as B, and Amanda as C.
- The dynamic between Túrin (C), Finduilas (B), and Gwindor (A) in The Children of Húrin is best described as a type five triangle. It also has elements of type 12: Túrin is loyal to Gwindor, and Finduilas and Gwindor were ex-lovers.
- One of Heinrich Heine's most-quoted poems, No. XXXIX of the Lyrisches Intermezzo, describes a situation like this: A young man loves a young woman, she loves a different man who loves and marries someone else entirely. The young woman then marries somebody who happens to cross her path, leaving the first young man distraught:
Das ist eine alte Geschichte,Doch bleibt sie immer neu;Und wem sie just passieret,Dem bricht das Herz entzwei.
- (That is an old story, but it always stays new; and it breaks the heart of anyone to whom it happens right now.)
- A Song of Ice and Fire: During their childhood and teenage years, Lysa loves Petyr, and Petyr loves Lysa's sister Catelyn. This starts to veer into polyhedral territory once marriages and betrothals are added, although it's a straight example again once Jon Arryn is poisoned and Ned's head removed, all at Petyr's behest.
- In Tales of Kolmar, Vilkas, Will, and Aral are all friends. Aral has an obvious crush on Vilkas, who is aware of it but doesn't want her, while Will pines after Aral, who has no idea. When Aral gives Vilkas her Anguished Declaration of Love it's seen as a betrayal to everyone; when Will gives Aral his declaration it's seen as sweet and romantic.
- The childhood love triangle in Midnight's Children.
To save time, I shall place all of us in the same row at the Metro cinema; Robert Taylor is mirrored in our eyes as we sit in flickering trances — and also in symbolic sequence: Saleem Sinai is sitting-next-to-and-in-love-with Evie Burns who is sitting-next-to-and-in-love-with Sonny Ibrahim who is sitting-next-to-and-in-love-with the Brass Monkey who is sitting next to the aisle and feeling starving hungry.
- Smallville early season one: Pete wants Chloe, Chloe wants Clark, Clark wants Lana, all unrequited...for now. Pete is the only one who never gets any love.
- Season four: Clark is still crazy over Lana, and Chloe is still crazy over Clark.
- Willow wants Xander who wants Buffy, particularly in the early part of season one. Once Buffy decides she wants Angel and it's clear he likes her, it becomes quadrilateral. Ah, high school.
- The Best Years had this love triangle in season one. Dawn had feelings for Trent, but he had feelings for Samantha instead.
- For most of My So-Called Life, the Brian (A) - Angela (B) - Jordan (C) love triangle was of this type. Many people think it still is; the rest saw it mutate to #4. In "Life of Brian", it briefly became a rectangle with Delia (uh, A'?), but Brian quickly destroyed that with the Idiot Ball.
- Charlie, The Waitress, and Dennis in It's Always Sunny in Philadelphia. Charlie is obsessively in love with the Waitress, who despises him. In turn, the Waitress is in love with Dennis, who is openly contemptuous of her. Each member of the triangle, as well as outsiders (such as Mac), attempt to manipulate the rest of the triangle for their own benefit.
- It's more than a triangle, but in Downton Abbey series three, Daisy, the assistant cook, wants Alfred, a footman, who wants Ivy, the kitchen maid, who wants Jimmy, the other footman. In the words of Mrs. Patmore, the cook, "You know, the trouble with you is that you're all in love with the wrong people!"
- In Dead Gorgeous, Jonathon has a crush on Rebecca, who has eyes only for hunky jock David, who regards Rebecca only as a friend.
- Star Trek: Deep Space Nine: Ziyal is in love with Garak, Garak is in love with Bashir, and Bashir has his own, uh, highly populated love life to contend with.
- Quite a few Miyuki Nakajima songs. Most well-known example is "Akujo," where the singer is A, the man she's singing to B, and Mariko C.
- In the Vocaloid song Daughter of Evil, Rin Kagamine (Daughter of Evil, as well as princess of the kingdom of yellow) falls in love with the prince of the blue kingdom by the sea, Kaito. However, he falls in love with a girl from a green land, Miku. Since Rin does not know which girl Kaito fell in love with... It doesn't end too well for the green land.
- The J. Giles Band's "Love Stinks" describes this in the first verse.
- The Taylor Swift song "Invisible" is this. The narrator likes a guy who likes another girl, and the song is basically her trying to convince him to pick herself instead of the other girl.
- Peanuts: Lucy (A) is (terribly) infatuated with Schroeder (B), who's only interested in playing his piano (C). Peppermint Patty (A) likes Charlie Brown (B) but he only likes the little red-haired girl (C), who has no interest in him. Sally (A) likes Linus (B) who doesn't seem that interested in anyone, except sometimes teacher Miss Othmar. Frankly, Peanuts just runs on All Love Is Unrequited.
- All's Well That Ends Well: Helena loves Bertram, who's attracted to Diana.
- Richard Strauss's opera Arabella has Zedenka (A), Matteo (B) and Zedenka's sister Arabella (C) — complicated by (and eventually resolved thanks to) a rich suiter Mandryka who wants Arabella.
- "Parlor Songs" from Sweeney Todd.
I am a lass who alas loves a lad
Who alas has a lass loves another lad
Who once I had
- In Ace Combat 5: The Unsung War: Chopper (A), Edge (B), and Bartlett (Blaze later) (C).
- Mega Man Battle Network has Dex at A, with Maylu at B and Lan at C, though Maylu and Lan end up getting together.
- In Star Ocean 1, Dorne (A), Millie (B), Roddick (C)
- College Roomies from Hell!!!!!! has one of these after Blue makes her entrance, with Blue at A, Dave at B, and Margaret at C. This later turns into a type 4, see above.
- In Life, Felicia decides that such a triangle exists with her roommate Madison interested in "Edward" interested in herself. Unusually, her intended solution is to convince Edward to go with Madison, leaving herself alone.
- That Guy with the Glasses: The Nostalgia Chick is A, Todd in the Shadows is B, and Obscurus Lupa is Cnote .
- RWBY has Pyrrha, who likes Jaune, who likes Weiss, who likes Neptune, who likes Yang (as well as everything with a skirt).
- The situation in The Legend of Zelda cartoons, edging on Type 4. Link (B) likes Zelda (C), who knows full well what a loser he is, and whenever she decides he's being cute enough to get a kiss, circumstances intervene. Meanwhile, Spryte (A) is in lust with Link, often bashing Zelda right before trying to come on to Link...who prefers his girls a little taller than three inches. (Incidentally, Spryte is one of the three girls in the series who he actually does get kissed by.)
- In Total Drama World Tour, Sierra has a Fangirl Crush on Cody who still has feelings for Gwen.
- On Jimmy Two-Shoes, Peep loves Heloise, who loves Jimmy, who's Oblivious to Love.
- Hey Arnold! originally had Helga crush on Arnold, while Arnold had a Precocious Crush on an older girl named Ruth. Ruth was later written out of the show, but the same scenario developed with Lila, who wanted to be Just Friends with Arnold. And in turn, Helga had Brainy as a Stalker with a Crush.
6. Alice wants Bob and Claire, who are already in a relationship. In this one, the "want" may or may not be sexual in nature — this could just be a platonic thing.
Anime and Manga
- Tatewaki Kuno in Ranma ½ is the "a" in this scenario (although he doesn't know/won't admit it), with Ranma (as a girl) and Akane as "b" and "c".
- Sailor Moon Fanon theorizes that Rei Hino (a), Mamoru Chiba (b), and Usagi Tsukino/Sailor Moon (c) are in this stage. In canon, their relationship was more of a type 4 triangle.
- Kyon and Mikuru (B and C) are mutually attracted to each other, while Haruhi Aa) lusts after both. And Oharuhi-sama gets what she wants... Hilarity Ensues.
- In Love Hina, it's (humorously) implied that Mutsumi is in love with Keitaro and his destined love Naru, but that she wants to see both of them be happy together.
- Kyoya's English voice actor thinks Kyoya is in this type of scenario as the A with Tamaki and Haruhi as the B and C, and that Kyoya is okay with this, and would rather see them happy with each other than be with either himself.
- Rosario + Vampire plays with this a bit. Yukari is into both Tsukune and Moka, who are pretty much an Official Couple. Her plan? Push them that last mile and get in on the action.
- In Clover, Suu has a crush on both Ora and Kazuhiko, who are in a relationship with each other.
- Haiyore! Nyarko-san starts off as a Type 4, with Nyarko head-over-heels for Mahiro, who likes her but is Tsundere and Can Not Spit It Out, and Cuuko having an unrequited Psycho Lesbian crush on Nyarko. Cuuko eventually warms up to Mahiro after he treats her with genuine kindness and decides she's totally okay with their becoming one big happy threesome.
- In The Walking Dead, Carol (a) grows feelings for married couple Rick (b) and Lori Grimes (c), constantly telling them both she is in love with them, and suggesting to make a polygamous relationship work and raise one another's children together. However, she is shot down by both Rick and Lori on this idea, and berated for not focusing on being a mother to her daughter Sophia.
- In Empowered, Emp is in a relationship with Thugboy, and Ninjette has feelings for both of them... Which, since they're her friends, she mostly keeps to herself.
- Advice And Trust: Asuka and Shinji are in a relationship, and Rei has comes to love both of them, but Rei is unwilling to rock the boat by trying for the "Israfel Special". Much to the frustration and disappointment of many of the readers!
- In Pokémon fanfic Symbiosis, Captain Torch has feelings for Sabrina and Atsushi, whom are both in a relationship with each other.
- Played for (very uneasy or extraordinarily guilty) laughs in Rocky Horror Picture Show, in which Dr. Frank-N-Furter (a) seduces both Brad and Janet (b, c) with practically the same dialogue in back-to-back scenes. Yes, it's that kind of movie.
- Sophie's Choice — Stingo loves Sophie and Nathan dearly, even if not sexually in the case of Nathan.
- In Plan B, Bruno (A) tries to seduce Pablo (B) as part of a scheme to get him to break up with Laura (C). His ultimate goal is to switch places with Pablo in this triangle as he's actually straight and Laura is his ex-girlfriend he wants to get back together with by hook or crook. Except that it turns out he's not as straight as he thinks he is and Laura is the one who ends up switching places with him as he and Pablo develop genuine feelings for each other to the point where they're forced to tell her that neither of them can be with her.
- It's very easy (and entertaining) to read the Sid/Michelle/Tony triangle in Skins this way.
- There has been more than one gay-themed dating show where two of the contestants chose each other over the bachelor.
- Mulan is heavily implied to have fallen for both Philip and Aurora (who are married) in Once Upon a Time
- 99% of Girl-on-Girl Is Hot scenarios (the girls being B and C, obviously), usually with A fervently wishing for a Type 8.
- Evoked for laughs in the Fred Godfrey song "Now I Have to Call Him Father" (the protagonist is "A"):
He used to come and court his little Mary AnnI used to think that he was my young manBut Mother caught his eye and they got married on the slyNow I have to call him Father
- In Mass Effect, Tali'Zorah seems to be in a bad case of this in regards to Female Shepard and Garrus. She gets flustered and nervous when telling Shepard she'd be willing to link suits with her, one of her species' most intimate shows of trust. Likewise, if she was not romanced by Male Shepard or if Garrus was not romanced by Female Shepard, Tali hooks up with Garrus at the end of Mass Effect 3.
- Comes to a head in the Citadel DLC, where, if she gets drunk enough, she mumbles as though in the middle of a threesome fantasy between herself, Female Shepard, and Garrus.
- In the webcomic Boy Meets Boy, Tybalt (a) tries to seduce Harley (b) away from Mikhael (c), who used to be his boyfriend. It's implied that Tybalt still has residual feelings for Mikhael, so his fixation on Harley probably has to do with jealousy as much as with desire.
- Misfiled Dreams uses Jenny in A with Ash and Emily at B and C. As Emily puts it, Jenny is attracted to Ash, Emily, and the relationship Ash and Emily have.
7. The classic "affair" set up. Alice is in a relationship with Bob, but she's also in a relationship with Charlie. Both Bob and Charlie don't know each other or suspect the other connection. Much of the drama/comedy comes from all the work needed to make sure that the space between B and C stays free from any sort of information flow. A lot of geography between the two helps, or maybe a good social divide.
7a. This set up also reflects a number of "family versus romance" situations. For example, Alice is a widow or divorcee starting a new romance against the wishes of her children. Bob (her son) and Charlie (her new man) are all too aware of each other in this case, but do not have a friendly relationship. Alternatively, Bob is an Overprotective Dad, Alice is his daughter, and Charlie is her boyfriend.
Anime and Manga
- In Tenchi Muyo!, both Ayeka and Ryoko love Tenchi, and he loves them back. They also hate each other, and constantly scheme to be his sole possessor. Tenchi, for his part, successfully navigates his two relationships, keeping the two in a balance in which neither decides not being with him at all would be better than sharing him.
- The risque Touhou doujinshi "Doll Suite" takes the usual #3 love-triangle of Marisa/Alice/Patchouli and throws it into #7 territory, with Alice being (A). Marisa, in particular, seems unhappy about having to share Alice with Patchouli, but ends up agreeing to play nice.
- In Cowboy Bebop, Julia was in a relationship with Vicious before she and Spike fell in love. When Vicious found out, it didn't end well.
- Averted in Sailor Moon. Mina falls in love with two men named Jack and Charlie and is trying to sneak back and forth through two dates with them at once. Why is it averted? Because Jack and Charlie are really Tiger's Eye and Hawk's Eye, competing with each other over who gets to look into Mina's dream mirror.
- Full Metal Panic!!!: Sousuke at A, Tessa and Kaname at B and C, both vying for his attention (and aware of the competition), with Sousuke feeling for both.
- Ran from Clover loves A as a brother, but A has decidedly un-brotherly feelings for Ran. Ran, meanwhile, is also in a relationship with Gingetsu. Could also be seen as a type 4.
- In Natsuyuki Rendezvous, A is the widow, B is her husband's ghost, and C is the new guy.
- While it was more a problem of attraction rather than infidelity, this was a problem faced by Peter Parker back when he was with Gwen Stacy and had some feelings (mostly shallow ones) for Mary Jane Watson. Gwen seemed to have won, though her death sadly came soon after.
- Reed and Sue are married with children, but Sue and Namor have had feelings for one another for years. They've only ever acted on them in alternate universes, but they've had a lot of alternate universes together. Later writers revealed that Reed was secretly also in the same situation with his first love/college sweetheart/ex-girlfriend Alyssa Moy.
- Marvel is just so fond of this, especially with the X-men: X-men Scott and Jean with Wolverine James; and later X-men Jean and Scott with Emma; and now apparently Scott and Emma with Namor!
- A pretty common place for superheroes in general to be. Writers are often divided on whether or not characters should end up married or what have you, so they introduce multiple love interests to muddy the waters. See Superman (Clark and Lois or Lana), Nightwing (Dick and Starfire or Oracle), or Batman (Bruce and Catwoman or Talia. Or Zatanna, Wonder Woman, Sasha Bordeaux...)
- Decks Fall Everyone Dies contains one: a=Joey, b=Duke, c=Tristan. This leads to a Murder the Hypotenuse situation.
- Also: a=Kaiba, b=Bandit Keith, c=Yugi. But Bandit Keith is more like a customer/opponent than an actual lover, and Yugi seems to have come to terms with this fact.
- Evangelion 303: Mandy wrongly believes that she was in a Type 7 relationship and her girlfriend Jessika cheated on her with Asuka, but in reality nothing happened between them (Asuka was Shinji's lover, she never cheated on him either and she never knew of Jessika's feelings).
- The One I Love Is: Shinji, Asuka and Rei have a Type 7 relationship (thankfully without affair): Shinji loves both Asuka and Rei and both girls love him, but they are rivals (although later they become friends).
- In Ancient Languages, the affair between Jared and Rachel prevents the marriage between Jared and Lyla.
- This is a major inter-Senshi conflict in the Neo saga from the Sailormoon Millennia Trilogy. Seishi and Kasumi both have romantic feelings for Ryuu, and while at first Ryuu is only interested in Seishi, he also falls in love with Kasumi partway through the story and can't bear to reject either of them.
- Casablanca falls into this category, with A=Ilse, B=Rick, C=Laszlo. To be fair, it happened because Ilse thought Laszlo was dead, and the ending resolves it with Rick bowing out.
- Clint Eastwood, Lee Marvin, and Jean Seberg in Paint Your Wagon. Not necessarily an affair, so much as both Clint and Sam are consensually married to the female lead. At least until Marvin decides to leave town in search of gold.
- In the movie Carny, a member of the road crew of a circus or amusement park (which is what the term Carny refers to) strikes up a romance with one of the customers. She decides she also likes his brother, and has sex with him, too. Apparently this doesn't bother or affect any of them, it's as if they have no jealousy at all, and have simply decided that both of them are going to share her with each other.
- Men with Brooms starts off as this, with A=Chris, B=Julie, and C=Amy. Eventually, Julie and Amy sit down to hash out their differences, and it is clarified that there is really no love triangle to speak of, due to Julie pretty effectively hating Chris ever since he left her at the altar years previously.
- The Road to El Dorado contains one of these when Tulio (A) starts ignoring Heterosexual Life-Partner Miguel (B) in favour of Femme Fatale Chel (C). Miguel is jealous of Chel for stealing Tulio's affections, although by the end of the film, they've seemed to become friends, possibly making this a Type 8.
- In Monsoon Wedding, Aditi had an affair with a man, but his refusal to leave his wife has caused her to accept an Arranged Marriage instead.
- Film/Bridesmaids has the Heterosexual Life-Partners version where A is Lillian and B and C are Annie and Helen trying to be Lillian's BFF.
- In Shakespeare's Othello, in the first act this is the predicament between Desdemona, her father, and Othello. Desdemona is recently married to Othello, but against her Overprotective Dad's wishes. Later in the act this issue is addressed in court when she explains to him how she must be devoted to both him and her new spouse.
- "The Rangers Three" in The Shadow of the Avatar trilogy go somewhere here. Sharantyr just does not want to abandon either and focus her attention on only one; Belkram and Itharr know this, but stay as the Vitriolic Best Buds they were.
- Twilight has Jacob and Edward both after Bella. Eventually this is "fixed" when Jacob Imprinted on Bella's infant daughter.
- In The Sky Is Everywhere, Lennie is in love with Joe, but also has "physical relations" with her dead sister's boyfriend (and fiancé) Toby. She picks Joe.
- Cry it out loud for The Great Gatsby, Daisy is married to Tom Buchanan, Jay Gatsby is Daisy's ex-boyfriend who's willing to do anything to get Daisy to love him again. And Daisy actually falls in love with him again, even though she still loves Tom. It doesn't end well.
- Shows up in the hints of the last book in the Night World series. Soul mates exist, and are usually A<—>B-type relationships. Then a main character sees the silver thread associated with soulmate bonds going from her to two guys...
- In Warrior Cats:
- Firestar loves both Spottedleaf and Sandstorm, who love him back. Spottedleaf is a medicine cat who cannot take a mate, and dies early on, but that doesn't stop her spirit from visiting him in his dreams, and Sandstorm can't help but feel she is "second best". Eventually Spottedleaf's spirit speaks to the pair, and convinces Sandstorm that she's the cat meant to be Firestar's mate. The authors also killed off Spottedleaf's spirit so that there wouldn't be issues when all three eventually make it to the afterlife.
- Squirrelflight becomes close to both Brambleclaw and Ashfur, but isn't sure who to choose as a mate. Eventually she realizes that she only views Ashfur as a friend, and chooses Brambleclaw. Ashfur doesn't take this well - he later attempts to kill her father, and the cats he believes to be her kits, in order to make her feel the same pain he felt at the rejection.
- In the fourth series, Dovewing ends up liking both Tigerheart and Bumblestripe, who like her back. At the end of the main series, she has broken up with Tigerheart and chosen Bumblestripe as her mate. However, in Bramblestar's Storm, the Super Edition that takes place after the series, Bramblestar notices that Bumblestripe and Dovewing seem to have had an argument or something, and that Tigerheart and Dovewing spent a lot of time talking at the Gathering...
- Red, Harley, and Stick are type 7a. Stick is an Overprotective Dad who doesn't approve of Red's relationship with Harley, a member of an enemy group. Type 7a could also apply to basically any inter-Clan relationship.
- Austin, from Grasshopper Jungle is in love with both his girlfriend Shann and his (male) best friend Robby, and both of them like him back.
- Smallville season six: While he would never admit it, now that Lana has moved on with Lex, Clark is clearly considering Chloe. And The Powers That Be decides to bring back (as in a one-line mention two years ago) Jimmy, who immediately starts dating Chloe. But Chloe and Clark arranges a sneaky totally-not-a-date in Sneeze.
- Season seven: Jimmy is involved with both Chloe and Kara. Chloe admits to Jor-El that she is still in love with Clark.
- Season eight: Jimmy and Chloe are engaged but Davis and Chloe secretly have feelings for each other. Although the whole situation is ambiguously influenced by Brainiac.
- An interesting take on this appears in Randall and Hopkirk (Deceased) wherein B (Marty) is dead. Normally this would leave A (Jeannie) and C (Jeff) to get on with things, but B has come back as a ghost only C can see, constantly haranguing him about it, leaving poor A oblivious to this.
- There was an episode of Bones where Brennan decided that more than one relationship was only logical, as one person couldn't fulfill all of her needs. She wound up dating a good-looking guy who pleased her sexually but bored her intellectually, and a smart but unattractive guy she loved talking with. She insisted to Booth that they were both rational and mature, and would understand... if she ever told either of them. In the end, they found out and both of them dumped her.
- This is all over the place in Mad Men, where workplace affairs are as common as sunshine in June. Some of the more notable extramarital liaisons, though, were Roger/Joan (who have both moved around the triangle since they've each been married, Roger more than once), Peggy/Pete (with Pete married to Trudy), and Don/everyone.
- Downton Abbey has Lord Grantham's affair with Jane, which is able to go undetected largely because of the upstairs/downstairs divide (and due to Cora being sick with Spanish flu for much of it) and because it never went far beyond kissing. The show also has 7a with Sybil (A), who is torn between her love for the chauffeur, Branson (B), and having to abandon her family and former way of living (C) if she marries him. But by the time she chooses to marry him, she's happy to leave her old life.
- Skins has a form of 7a with Emily (A), her girlfriend Naomi (B) and Emily's twin sister Katie (C). Katie is initially threatened by Naomi and in denial of Emily's homosexuality, because she's afraid of no longer being the number one girl in her sister's life.
- Goodnight Sweetheart is classed perfectly as this, with Gary at (A), wife Yvonne at (B), and girlfriend/fiance/wife Phoebe at (C). Luckily for Gary (who's not a good organiser), the chances of Yvonne and Phoebe figuring out what's really going on are nil, due to Yvonne being in 1993 and Phoebe in 1940. Unfortunately both of them still believe he's leading a double life with someone else behind their backs...
- On Grey's Anatomy, Callie, Mark and Arizona are this to a degree: Callie and Mark are best friends with occasional benefits until Callie starts dating Arizona. When they break up, she has an impulsive hookup with Mark and falls pregnant with his child. Arizona is initially quite upset, but eventually she reunites with Callie and they marry, all serving as parents to the baby Sofia. They become a type 8 when Mark (who is dating Julia but really loves Lexie, who is dating Jackson) and Arizona eventually grow to care for each other (platonically), but Mark then dies in a plane crash at the end of season eight.
- Supernatural: Sam starts dating Amelia, but when he meets her father, he doesn't approve of the relationship because the two are still grieving after losing someone and he thinks they're moving too fast. He can also tell Sam is hiding something. Then Amelia finds out her husband is still alive.
- How I Met Your Mother: in Season 4 where Ted and Stella are in a relationship and about to get married. But it turns out that Stella and her ex-boyfriend, Tony, still have feelings for each other which results to Ted being left alone at the altar.
- The Arthurian Love Triangle is generally portrayed as being either of this type, or of type #5.
- Thinking about it, Overprotective Dads are often stuck in this; Dad B, daughter A, suitor C. B-A doesn't have to be father-daughter, of course; any other intense but familial relationship in which one party wants to strike out into their own romantic interest (see the Skins example above) often plays out as this. If A and B are male Heterosexual Life-Partners, and it's a more comedically inclined show, expect B to say "We never talk any more!" to A in a really whiny voice at some point.
- Most "sailor with a girl in every port" situations are this (often with D, E, F, G,...)
- 7a is a common trope in storylines with a Gay Aesop. In older settings or works, it was often a straight-up affair situation, where a gay or bisexual person would be married to an opposite-sex Beard (C) while secretly messing around with someone of the same gender (B). In newer works, the gay or bi character may have the option of being in an open relationship with a same-gender love interest (B), but may still consider the choice of remaining closeted (C) in order to fit in better.
- Half-Life 2: Eli Vance, his daughter Alyx Vance and his co-worker Judith Mossman are a mild example of type 7a. Eli and Alyx love each other, Eli and Judith may be more than friends, and Alyx does not get on with Judith.
- In Shin Super Robot Wars, this trope happens with Amuro Ray (A), Aya Kobayashi (B) and Chen Agi (C). In a Space Route scenario, Amuro and Aya start complimenting each other on how swift they are in combat, Aya clearly interested in him as more than a fellow pilot. Chen continues glaring at the two of them from her place in hiding. In another Space Route scenario, Chen is pleasantly surprised when Amuro invites her to accompany him to the city.
- In Jak II: Renegade, Keira (A) is still in a relationship with Jak (B), but she also harbors a huge crush on Erol (C), who also likes her back and wants her to become his mechanic. She and Jak nearly break up when she refuses to believe that Erol was the main reason behind his Dark Eco corruption. By the big race, Keira finally shows her support for Jak, and calls him the best racer in Haven City. After the race, Erol becomes so angry at losing both the big race and Keira, that he tries to run over Jak, but ends up crashing into several barrels of Dark Eco.
- A variation occurs in Survival of the Fittest. Brendan Wallace (A) is in a relationship with Erik Laurin (B). However, Erik is secretly in love with Bobby Barron (C), who is also in love with Erik, but they don't know about it, since Bobby is in the closet and pretending to be straight, and, for all Erik is concerned, is "off-limits".
- In Strangetown, Here We Come, a Machinomic based on The Sims 2, both Ripp (B) and Johnny (C) want Ophelia, and she wants both of them. It later develops into more of a polygamous relationship.
- In Dr. Horrible's Sing-Along Blog, Villain Protagonist Dr. Horrible has an unrequited crush on Wide-Eyed Idealist Penny, who falls (sort of) in love with his archrival Captain Hammer after the latter (sort of) saves her life. However, this occurs just as Penny is also starting to have feelings for Dr. Horrible's Secret Identity, Billy, leading Dr. Horrible to attempt to Murder the Hypotenuse. Tragedy ensues.
- In the webcomic The Dreamer, there is an interesting spin on it. Beatrice is seeing two men — only one lives in the 21st century and one is in her "head". It Makes Sense in Context, believe me.
- In "Family," Gemma is in a longstanding relationship with Ben and Stuart. The guys each are in love with Gemma, and she reciprocates to them both. There is neither attraction nor jealousy between Ben and Stuart as they're both straight and truly devoted to Gemma. As Ben explains to his parents, "This is the love of my life, and I want to grow old with her. And this is the other love of her life, and I wouldn't dream of depriving her." (Their relationship is open, and all three engage in relationships of varying lengths and depths with others duing the series, but none of them is ever more important to them than their core family, or allowed to threaten it.)
8. Straight-up threesome. In polyamorous circles, this is called a triad. It may be a Ménage à trois. Not necessarily sexual in nature. See OT 3 and Polyamory.
Anime and Manga
- Hikaru, Lantis, and Eagle in Magic Knight Rayearth end up as this — though Type 9 seems to apply, as well.
- Rentarou and twins Sara and Sojyu enjoy a happy relationship together in Futakoi Alternative. Fighting is not uncommon, but there's no competition for affection or attention.
- Soul Eater has Death the Kid and the Thompson sisters, Liz and Patti.
- Yuki, Natsu and Kaho in SEX, though despite the existence of romantic feelings it seems to remain fairly platonic/innocent for the time being. (Ironically, considering the title of the manga, nothing sexual happens, aside of flirting.)
- Rito, Lala and Haruna from To Love-Ru become this at the very end of the original series.
- Utena, Anthy, and Akio in Revolutionary Girl Utena. A three-way tug of war, except with more incest.
- ElfQuest: Scouter, Tyleet and Dewshine, especially after Tyleet is pregnant with Scouter's baby. "She for she, they for him, he for them, all for the child. There is love enough."
- Doing It Right This Time is basically a kind of spiritual Fix Fic in response to Advice And Trust, as described in the Type 6 section.
- Shared Strength has Sinon and Asuna agreeing to share Kirito after Asuna nearly dies, Kirito reluctantly agrees.
- The movie version of Cabaret, although it's never really harmonious.
- In the (awesome) French film Les Chansons d'Amour, the main character and his girlfriend of several years start a three-way relationship with a co-worker of his.
- Another French film: Jules and Jim deals with two best friends and the woman they're both in love with. The relationship between the men doesn't seem to be romantic, just Heterosexual Life-Partners.
- The Theory of Everything depicts a real-life example. Stephen who has severe health problems, implicitly gives his wife Jane permission to have an affair with Jonathan. For a time, they form (with the children), a big, happy family. Eventually, Stephen divorces Jane and marries his nurse, while Jane & Jonathan marry.
- Bedlam's Bard series by Mercedes Lackey: Eric, Beth, and Kory, the main characters of the first two books are in one of these. Definitely sexual in this case; Kory is bi, Beth is attracted to both guys, and Eric spends the first book struggling with the idea that he is bi (although he doesn't struggle very hard). Results in a happy, magical (literally) threesome, at least for a while.
- Seen in Paul Kidd's Talking Animal novel The Fangs Of Kaath when one of the three main protagonists, Raschid, marries BOTH of the others, Sandhri and Yariim, who have also been feeling a growing attraction towards each other.
- Jun'ichiro Tanizaki's novel Manji (or Quicksand), which has at least three film adaptations and furthermore inspired the film The Berlin Affair by Liliana Cavani. Depraved Bisexual misfit beauty Mitsuko (A) hooks up bored housewife Sonoko Kakiuchi (B). Sonoko's hubby (C) wants a part of the action, and the couple grow morbidly jealous of each other. Mitsuko drugs the two so that they can only have sex with her but not with each other (turning the situation into a twisted Type 7). The affair ends with a Suicide Pact wherein only Sonoko, betrayed by the other two, lives to tell the tale.
- A Home at the End of the World (also a film): Jonathan loves Bobby and Bobby clearly reciprocates to some degree, but is also in a sexual relationship with Clare, who loves Jonathan platonically, as he does her. For a time they all live together and raise Clare's baby, who is presumably Bobby's.
- Lois McMaster Bujold's The Sharing Knife: Utau and Razi appear to be a gay couple when the unworldly protagonist first encounters them; then she finds out that as well as having a sexual relationship themselves, they're married to the same woman. In their culture, birth rates are low and marriages are often dissolved if no child is conceived, to give at least one partner a chance to have children with someone else. When Utau and Sarri didn't conceive, instead of splitting up they brought a third party into the marriage (and had a little girl). It's clear in later books that polyamory of this kind is unusual and not everyone approves.
- Shakespeare's Sonnets. The first 126 sonnets are full of Ho Yay and written to the Fair Youth. The following 28 are written to the Dark Lady. Sonnet 144 brings the triangle full circle by implying that the Fair Youth and Dark Lady are also lovers. Of course, there is jealousy and angst, at least on the narrator's side of things, and it's not clear whether he is still involved with either at that point, indicating a potential shift to Type 4.
- The Girl Who Circumnavigated Fairyland... meets two witches and their shared husband. The husband is a wolf most days of the month and a human for three days; one is married to the human, and the other is married to the wolf.
- Les Misérables: Implied by Hugo. Joly and Bossuet "shared everything, even, to some extent, Musichetta [Joly's unseen mistress]." Fanon says that they are in a polyamorous relationship, although it could be that Musichetta is only involved with them separately.
- Kim Stanley Robinson's Red Mars Trilogy: Marina, Ursula, and Vlad seem to fall into this category, though we never see them closely enough to be entirely certain.
- Wicked: Mentioned a few times in later parts of the the book as the eventual state of the relationship between Elphaba's parents (Frex and Melena) and Turtle Heart. Elphaba suspects that her parents' uncertainty over which man was little sister Nessarose's father is a large part of why Frex favors the younger daughter after Turtle Heart's death.
- The Giddy Death Of The Gays And The Strange Demise Of Straights: Dom and Richard fall into a deep, nonsexual love, and form a trio with Dom's girlfriend Caroline.
- The Belgariad: Sir Mandorallen is in love with a woman, who is in love with him. Said woman is married to a much older man, who also happens to be Mandorallen's father in all but name. Mandorallen is far too noble to go behind the back of the man who took him in and more or less raised him. Mandorallen's love interest is far too noble to betray her husband. The husband is far too noble to let two people he loves and who love each other live their lives separated by external circumstances and has taken up dragon-hunting and warfare in hope that this will give the young lovers the opportunities they need. Apparently, every woman in Arendia sheds a tear every night before going to bed at the sheer levels of tragic nobility involved.
- In an episode of Dark Angel there's a (throwaway) mention of a man who hired a detective agency on his wife only to learn that she has been cheating on him with his mistress. (What's left unresolved is whether he should consider it good or bad news.)
- In Hollyoaks, Nancy and Ravi were dating, but both also desired Kris, who desired both. And both ended up having an affair with Kris, without the other knowing, though it continued (but not for long) after they all found out. An example where this diagram is not a straight-up threesome.
- Skins: Those who don't see the Freddie/Effy/Cook love triangle as a type 11 see it as this. Effy is attracted to Cook and Freddie, who are both into her; however, Cook and Freddie are also best friends, to the point where their affection for each other is borderline-homoerotic. The story isn't just about Effy choosing between Cook and Freddie, but also how their mutual attraction to Effy and fights over her are changing Cook and Freddie's friendship.
- How I Met Your Mother: With regards to the Ted/Robin/Barney triangle, it can be a Type 8 where Ted and Barney are "bros" and are both in love with Robin. Robin loves them both but she chooses Barney until their divorce and possibly ends up with Ted who became a widower in the series finale.
- Somehow strange example happens in Wicked. At the beginning Glinda and Fiyero are in a relationship, while Elphaba has unrequited feelings for the latter, but also share a lot of Ho Yay moments with Glinda. With a time, Fiyero falls for Elphaba, but still dates Glinda. It’s safe to say that at some point all three parties all in love with each other. The ones that end up together are Elphaba and Fiyero, with Glinda left behind to rule Oz.
- Kingdom Hearts: Sora, Riku, and Kairi's relationship can be interpreted as a non-sexual, mix-of-love-and-friendship version of this type. The same can be said of Roxas, Axel and Xion in Kingdom Hearts : 358/2 Days.
- Skies of Arcadia: It's easy to interpret the relationship between Vyse, Aika and Fina as this.
- Fate/stay night series has two possible. Shirou/Saber/Rin or Shirou/Sakura/Rider. Both have even their own ending in the original game. First one culminate as a real Ménage à trois in Unlimited Blade Works Good End. Second one is implied in more family-like spirit at Heaven's Feel True End. Both are also hinted at various levels in fan-disk sequel Fate/Hollow Ataraxia and many other associated works and materials.
- The 7a variant is applied to a type 8 in CLANNAD. On Kyou's route, she has feelings for protagonist Tomoya, but tries to suppress them because she knows that her twin sister Ryou also has feelings for him and instead actively tries to set the two of them up. It works, for a time, but given that it's Kyou's route, it's obvious what happens in the end. Might actually be a type 11, though, if Tomoya never really loved Ryou.
- School Days: In "Two Lovers" ending it turns out like this between Makoto/Kotonoha/Sekai. With both girls successfully develop bisexual feelings for each other and deciding to "share" Makoto. While Makoto accept to love both equally. In the end both girls become pregnant and decide announce that to Makoto as christmas present, while holding hand together.
- Niels: The premise of the comic is exploring the three main characters' polyamorous relationship.
- The "not necessarily sexual" type in the version of the Arthur/Guenevere/Lancelot triangle seen in Arthur, King of Time and Space. Arthur and Guenevere are married and in love, Lancelot and Guenevere are having an affair and in love, Arthur and Lancelot are Heterosexual Life-Partners and Arthur knows about the affair but (mostly) is happy that his friends are happy. And then, in the final strip it turns out he was attracted to Lancelot as well, but knew Lancelot was straight and didn't want to push it.
- Girl Genius has one of these in the making. It's yet to get sexual, but you can cut the UST with a butter knife. Agatha deffinately feels something special for both Gil and Tarvek. Who return it to her in spades. Gil and Tarvek also have a very complex relationship between them that is somewhere between a Bromance and a Rivalry and which neither wants to do without, so won't upset even to try one-upping the other in front of Agatha too much — well, much. Although it's all a little too rumbuntious to call a stable triang, they all care for the others in it and will repeatedly go out on a limb for each other. Even if they don't entirely trust each other, either. Still... anybody who tries to step between those three had better hold onto their hats, because they're going to be minced for the audacity of stepping into their dance uninvited.
8b. Can also be construed as "mutual affairs". For instance, A and B are in a relationship, but each one is secretly cheating on the other with C - at the same time. This is even more rare than the threesome variant.
9. Bob and Charlie are attracted/loyal to each other but are also attracted/loyal to Alice. Bob and Charlie might be best friends or siblings, and much of the conflict comes from wanting to pursue Alice but not wanting to hurt the other.
Anime and Manga
- In Macross Frontier, Sheryl and Ranka are both in love with Alto and are good friends (sometimes acting quite sisterly) with one another. The last scene in the TV series even has Ranka declaring to Sheryl that she's not giving up on him, to which Sheryl smiles and nods encouragingly.
- In Touch, twins Tatsuya and Kazuya are both in love with the same girl, Minami Asakura, who loves them both. Unfortunately, this one loses a leg early on in the series. Fortunately (well, fortunately-ish), it's not the leg she's interested in romantically.
- Just one of many situations in Mahou Sensei Negima!, Yue and Nodoka are best friends who are both attracted to Negi. Being bookworms, both the girls are incredibly Genre Savvy as to how its likely to end and the presence of a triangle is even Lampshaded by them at one point.
- Konoka and Setsuna both initially showed interest in Negi (enough to pactio, at least), but as the series continues it's become increasingly obvious that the two will end up together. At this point, the pairing is one step short of canon. It's heavily implied (but not confirmed) that the two of them got married in 2017.
- A Type 9 forms the core of My Monster Secret's conflict. Asahi is very much in love with Youko, but she's Oblivious to Love for a good part of the story. Aizawa develops feelings for Asahi, and briefly tries to sabotage his attempts to confess to Youko, but feels guilty about it and quickly stops. She and Youko are good friends and start cheering each other on, though Youko doesn't realize her own deeper feelings for Asahi until the sight of him with Aizawa starts making her feel sick and upset. Eventually Aizawa throws her full support behind Asahi and Youko (which leads to their finally confessing and becoming a couple), and finally gives up on him… or at least tries to, but her body has a hard time following her mind.
- Pick a Mary Sue fic (more specifically, any Relationship Sue fic). Mary Sue is at 'a', of course, and B and C are occupied by lesser mortals who have been enchanted away from their sexual identities, loyalties, duties, and all other responsibilities by the mesmerizing beauty of her violet eyes. Naturally, Mary Sue is too noble to allow them to depart the Righteous Path.
- In My Immortal, Harry/Vampire (b) and Draco/Darko/Drako (c) are both utterly in love with Ebony Dark'ness Dementia Raven Way (a), but that doesn't stop them from having an active sexual relation with each other.
- My Father The Hero, where a girl tells the boy she likes that her father, who has taken her on a holiday, is actually her lover. Wackiness ensues.
- In silent comedy film Hands Up!, the protagonist, a Confederate spy in The Wild West, falls in love with each of a pair of daughters. Each daughter nobly offers to step aside for the other one. He resolves this dilemma by marrying them both.
- In Harry Potter, Ron and Hermione are a case of Opposites Attract. But one thing they do have in common is their shared loyalty/affection toward Harry.
- Delia(A), Eric(B) and Fitz(C) in Vanishing Acts by Jodi Picoult, only Delia and Eric are engaged, which makes it also have elements of Triang Relation #4(with Fitz as as A, Delia as B and Eric as C). Fitz eventually gets Delia, though.
- In Vampire Academy, Dimitri and Rose are in love, but worry that their relationship will get in the way of their mutual duty to protect Lissa.
- In Shanghai Girls, sisters Pearl(C) and May(B) both want Z.G Li (A). In Pearl's eyes, she is Z.G.'s true love, but that is not the case. Z.G. and May have a relationship and May ends up getting pregnant. In the sequel Dreams of Joy, there is a partially platonic one going on, with both Pearl and her daughter Joy actually May's child with Z.G. both wanting love and affection from him.
- This variant occurs in Doctor Who. The Doctor at A, Jack at B, and Martha at C. The Doctor, wary of relationships to himself and Jack, tries to keep all three relationships platonic.
- In the Korean Series The First Shop Of Coffee Prince, you have this trope bordering on Love Dodecahedron. Cousins Choi Han Kyul and Choi Han Sung both crunch on same two women (but not at the same time). It all sorts itself in the end.
- In Darkest Powers, in pure Sibling Triangle fashion, Derek and Simon are brothers and best friends, but both are very attracted to Chloe. Despite this, they don't fight about it and neither wants to hurt the other. It's to the point where Derek tries to push her away and over to Simon so that his brother can be happy, but then Simon turns around and does the exact same thing upon realizing that the one Chloe likes is actually Derek. Not that Chloe is aware of this at the time, however, and remains in denial about it for a while even after Simon tells her so.
- On Glee, this happens with Jake and Ryder, who go from bitter enemies to frenemies to best friends due to their shared interest in Marley. Hell, many fans feel that the two boys have better/more interesting chemistry with each other than either of them have with her.
- In Peanuts, Peppermint Patty and Marcy are both fond of Charlie Brown but are often perceived to be more than just friends.
- In Final Fantasy VIII, Seifer's henchmen, Fujin and Raijin, are utterly loyal to him. As he grows more distant, they start to depend more and more on each other, eventually parting ways with their leader.
- In Tokimeki Memorial Girl's Side, activating Rival Mode with a female friend causes this. The strength of the B-C bond (and how persistent you are in making up) determines whether she steals your guy or decides I Want My Beloved to Be Happy and tells you to take care of him for her.
- Occurs twice in the Persona 2 Duology, both times with Maya Amano as A and Tatsuya Suou as B. Word of God says that Maya was Tatsuya's first love; he is fiercely determined to protect her, but due to the nature of their relationship does not see her as an eligible romantic option. Maya's feelings for him are unconfirmed. The role of C is filled by Jun Kurosu in Innocent Sin and Katsuya Suou in Eternal Punishment. Jun is Tatsuya's best friend who shares his devotion to Maya, but is also romantically interested in Tatsuya himself. Their pairing has been borderline confirmed and the promises they have made to each other drive the plot. Katsuya, on the other hand, is Tatsuya's older brother who falls in love with Maya over the course of the second game, though his devotion to the former prevents him from acting on his feelings for the latter.
- In Total Drama World Tour Courtney (B) and Gwen (C) are good friends but both want Duncan (A). Since Courtney and Duncan are in relationship and Gwen has been hiding her feelings from both this has elements of Triang Relation #4. Very recently this has become a #10 with Duncan revealing he wants Gwen, while at least for the moment still being with Courtney.
10. Alice and Bob are in a relationship, but Bob is attracted to Charlie. How sympathetically Bob is played depends on their gender. Similar to Type 4, but with a different point of view.
Anime and Manga
- Maison Ikkoku: Kozue (A) is dating Godai (B) who is two wishy-washy to break up with her, while he pines over Kyoko (C)
- The last major conflict of the series to be resolved is that Kyoko is B to Godai's A and her late husband Soichiro's C. In a Crowning Moment of Heartwarming Godai decides it's Type 8.
- School Days starts out like this. Makoto and Sekai are childhood friends, and Makoto has a crush on Kotonoha. (And Sekai has a secret crush on Makoto.) Sekai helps Makoto and Kotohona get together, turning it into a Type 7 or 8 depending on how you want to interpret Sekai and Kotohona's relationship. When Sekai and Makoto take their relationship to another level, however, things go bad and then get worse. Much, much worse.
- Vampire Knight Yuki (B) chooses Kaname (A), but admits to still having feelings for Zero (C). Could also be a number seven, if Zero (still) feels the same about Yuki.
- Interestingly done in the original Spider-Man comics. For a while, Peter and Mary Jane were in a relationship, but Peter wanted to be with Gwen. At the same time, Gwen and Harry were in a relationship, but Gwen wanted to be with Peter. Interestingly, both Peter and Gwen are seen sympathetically, despite their gender. Then again, the male is Spider-Man.
- Shaun of the Dead: Dianne (A) and David (B) have a relationship but it turns out that David has an unrequited crush for Shaun's girlfriend Liz (C).
- Ethan Frome revolves around this kind of triangle, with Zeena at A, Ethan at B, and Mattie at C. It ends tragically.
- Smallville late season one: Chloe is in a relationship with Clark, but Clark also wants Lana.
- Very briefly in the finale of season five: Chloe gives Clark a passionate Now or Never Kiss and he definitely reciprocates... but he never, ever gets over Lana.
- Simon's attraction to Jenny despite being in a relationship with Maggie in Teachers
- Early Niles and Daphne again, this time with Maris at A, Niles at B and Daphne at C.
- Angel: Lilah as A, Wesley as B and Fred as C.
- In Buffy the Vampire Slayer, Spike seemed to have trouble remembering that Harmony was his girlfriend.
- In Downton Abbey, Mary and Matthew are clearly attracted to each other despite each being engaged to other people. This doesn't last; Matthew's fiancee dies of Spanish flu, and Mary breaks it off with her fiance when she decides the dirt he plans to blackmail her with isn't enough to risk a miserable marriage to him.
11. The classic affair set up with a twist. Alice is in a relationship with Bob and Charlie, but Bob becomes attracted/loyal to Charlie. Bob and Charlie may or may not know about the other's involvement with Alice. This situation is clearly the fault of Alice, who failed to control the information flow properly. Bad philanderer! No biscuit!
Anime and Manga
- In Toradora!, this is the case with Ryuuji (A), Minori (B) and Taiga (C). This is a very strange twist of Matchmaker Crush. Taiga is trying to set up Ryuuji (who starts to take care of her) with Minori (who is Taiga's best and initially only friend). Taiga develops an emotional dependence on Ryuuji, who develops feelings as well. It turns out that Minori already had a crush on Ryuuji, but also had strong feelings for Taiga. Taiga remains good friends, but doesn't quite reciprocate Minori's feelings. Since the Official Couple is actually the title of the show/novels, bummer for Minori. Since everyone in this triangle is too nice to betray anyone, this draws out for a while.
- Death Note gives us L (A) obsessed with his suspects, Misa (B) in love with and obsessed with Light but teases / flirts with L, and Light (C) obsessed with L and pretending to have a relationship with Misa.
- Another one crops up later with Takada (A) seeing both Mikami (B) and Light (C) but Mikami is also VERY loyal to Light...
- There is a complex relationship dynamic going on between Nanoha, Subaru, and Teana in Magical Girl Lyrical Nanoha Striker S: Subaru (B) is Nanoha's biggest Fangirl (following a Heroic Fire Rescue that turned her life around) and is about as straight as a rainbow for Teana, her longtime partner and soulmate. Teana (A) will never admit liking that baka Subaru and simultaneously has a Rage Against the Mentor-turned-Rivalry relationship with Nanoha (C), who seems to acknowledge said rivalry (if ViVid is any indication, the two of them still have a bone to pick over who is better at Shooting magic) but does not pay much mind to Subaru's fangirling beyond encouraging her to follow her dreams (which boil down to being more like Nanoha, anyway). And just to make the parallels between Subaru's relationships with Nanoha and Teana more blatant, Sound Stage X has Teana rescue Subaru by creating a Dungeon Bypass in a manner very similar to her aforementioned Heroic Fire Rescue by Nanoha.
- Karla, Daken, and Lester of Marvel Comics Dark Avengers seem to be dancing around becoming this. Adding Daken's emotion controlling pheromones into the situation just complicates things further.
- Crystal Robot’s Invader Zim fic, A ZADR Story, starts off with this love triangle. Dib is dating OC Cassie, Cassie is Zim’s sister, and Zim is attracted to Dib. Later on, Zim and Cassie switch places, until eventually, Cassie’s relationship with Dib dwindles to a close friendship, turning the love triangle into a type 7a.
- Sho, Kei, and Yi-Che in Moon Child.
- In Too Many Husbands, (a comedy version of Enoch Arden), Vicky loves both Bill (her first husband, who returns after being declared Legally Dead) and Henry (her second husband, Bill's business partner). They both love her, and they are best friends with each other, but each wants Vicky exclusively.
- The Secret Garden: The 1993 film plays this way up. You can almost feel the U(non)-ST coming off of Dickon and Mary (swing scene particularly), and Colin flat out says he wants to marry her.
- Some versions of the Tristan and Isolde story portray the love triangle this way: Isolde (A) is married to Mark (C) but in love with Tristan (B), who is in love with her, but is also loyal to Mark, who is his uncle.
- In Enoch Arden, Enoch (B) and Philip (C) both love Annie (A); all three are also childhood friends. Annie first marries Enoch and then, after he is lost at sea and [[Legally Dead presumed dead], she marries Philip.
- The interpretation of the Arthurian triangle that Marion Zimmer Bradley gives in The Mists of Avalon.
- The overarching plot of Tabitha King's Pearl: Pearl develops a romantic relationship with both Reuben and David without knowing that the two men have a had a decades-long, extremely painful history with one another before Pearl's arrival. David has only recently forgiven Reuben, while Reuben, out of guilt, is now highly protective of David. Pearl realizes that telling either that they are now romantic rivals might push both over the edge.
- Water For Elephants, kind of: Jacob feels guilty about his attraction to Marlena at first because he is loyal to August, but when he realizes how dangerous August is and how he mistreats Marlena, he grows to hate him. However, he has to pretend to still be loyal to him to protect the two of them, as well as his other friends in the circus. Marlena struggles with her residual feelings for August before finally realizing that he's terrible and Jacob is far better, but must also keep up pretenses so they don't all get fired and/or killed. Phew.
- The Secret Garden: Mary, Colin, and Dickon. Make of that what you will.
- In Fear of Flying, Isadora and her husband Bennett go to a conference in Germany, where Isadora starts having an affair with Adrian. It's strongly hinted that Adrian is interested in Bennett as well—the narrative comments on it several times—and at one point, it's implied that the two men slept together.
- Doctor Who: Rose, Jack, and the Doctor. Rose would be A, Jack would be B, and The Doctor would be C. Rose and The Doctor are heavily implied to have feelings for one another in the first season of the new Doctor Who series. When Jack shows up, its obvious that there's something between him and Rose as well. However, while Jack initially simply seems to feel competitive towards The Doctor, the feelings seem to develop into... something else. However, it's clear that things won't go beyond flirting where Jack is concerned, and the Doctor tends to flirt back at him, making this an oddly chaste and playful 8.
- Nothing "odd" about the chasteness. The Doctor had previously been presented as asexual so they didn't want to upset the old fans. Plus, it's a family show with a primary audience of kids. The fans of this OT 3 normally see it as a case of a blooming relationship tragically cut short by character death.
- Cook/Effy/Freddie in Skins (B/C/A respectively) reaches this point at the end of series 3. Effy loves Freddie, and he loves her back, but Cook also holds affections for her, and Freddie does not want to betray Cook by going out with Effy.
- Frasier had a variation on this with Frasier playing the role of (C). Being romantically interested in a woman (A) who was in a romantic relationship with another man (B), but is herself at least very open with Frasier. Her boyfriend, on the other hand, has no idea that Frasier is a romantic rival and thinks his constant presence is a result of his undying loyalty as a friend.
- Downton Abbey has this with Matthew (A), Mary (B) and Lavinia (C). Matthew and Lavinia are engaged, but Matthew and Mary are still in love with each other. However, Lavinia turns out to be a sweet girl and she and Mary become close, causing Mary to feel torn between her love and her friend. (It's worth noting that Mary and Lavinia's friendship is strong enough to make them one of the more popular non-canon ships.)
- Incredibly, this is the resolution of the love triangle in Fans! (at least where the original ending left things). By the time of The Revival, they've graduated to type 8, as Rumy and Aly both decided that If It's You, It's Okay.
- In King of the Hill, this is the general idea of the Dale-Nancy-John Redcorn triangle. Dale and Nancy are married, Nancy has had a years long affair with John Redcorn (and has had his son, who Dale believes is his, being oblivious to the obvious clues), but Dale has generally positive feelings about John Redcorn who he believes merely treats his wife's headaches. Comes to a head when Dale assists John with his suit to gain land as reparations from the government, and John decides to end the affair since he cannot screw over someone who has treated him as a friend.
12. Alice and Charlie are in a relationship, often married, but Alice likes Bob and Bob likes/is loyal to Charlie. Depending on genders this can be a hilarious or very tragic set up.
Anime and Manga
- With all the Ho Yay floating around, it's hard not to read the main Love Triangle in Berserk this way, with Casca serving as A, Griffith as B, and Guts as C. After some developments, this setup evolves into a Type 11, then reverts back to 12 in the most tragic way possible before being ripped completely apart by the events of the Eclipse. If you haven't figured it out yet, relationships between people in Berserk are kind of screwed.
- The relationship between the main characters in Being John Malkovich. Craig (A) and Lotte (C) are married, but Craig falls for Maxine (B) who couldn't care less about him and is enamored instead with Lotte (but only when she's in Malkovich's body at first...yeah, it's that kind of movie).
- The backstory to Slings and Arrows, with A being Ellen, B being Oliver, and C being Geoffrey.
- The relationships between Johnny, Lisa, and Mark in The Room.
- In Arthurian legend, this is how the relationship between Guinevere (A), Lancelot (B), and Arthur (C) plays out, with Lance torn between his attraction to Gwen and his loyalty to Arthur.
- Hisao, Misha, and Shizune respectively, in Katawa Shoujo. What makes this situation particularly interesting is that one bad choice on Hisao's part (when the unfortunate Misha comes to ask Hisao for "comfort") can unravel all three's relationship.
13. Alice must choose between Bob and Charlie, but Bob is also attracted to Charlie. Could arise in a gay/bisexual situation, or could be non-sexual in nature. The non-sexual setup might be something like a boy (A) wants to please his dear old Mum (B) and wants to do naked things with his girl (C). Dear old Mum likes the girl, and monopolizes her attention with shopping trips and general girl-to-girl socializing stuff that greatly reduce C's naked-fun time.
Anime and Manga
- Hayate the Combat Butler has this with the titular butler at point C, Hinagiku at B and Nishizawa at A. Of course, this being a Harem Series, there's a much larger Love Dodecahedron involved.
- In Yuru-Yuri Kyouko is A, being interested in both Childhood Friend Yui and Mirakurun-lookalike Chinatsu (although it's more lust than love). Chinatsu in turn is head over heels in love with Yui, while Yui doesn't show any such feelings to anyone and is happy with being friends with both.
- Eric in That '70s Show was in the second situation for an episode. He was dating Donna and loyal to his mother, Kitty. Kitty and Donna then start going out shopping and lunching, cutting down on Eric's happy naked fun time with Donna.
- In season one of Merlin, Gwen has a bit of a celebrity, would-never-admit-it crush on Arthur, but spends most of her time pining over Merlin. Too bad Merlin is too preoccupied with his Completely Platonic Destiny Says So Soul Mate Arthur.
- Penny and Aggie: Put Michelle at A, Stan at B, and Rich at C.
- Candi: Bisexual Trevor is at A, having to choose between Laura at B and Matt at C. Laura is attracted to Matt, though she won't admit it.
- All Grown Up!: in "Lost at Sea", Tommy is A, Didi, his mother, is at B, and his girlfriend Rachel is at C.