Basically this is when Father, I Want to Marry My Brother
goes horribly wrong. For some reason a person really does want to marry their sibling. Even though they understand what that means
. This is most commonly depicted in the form of a younger sister who has developed some sort complex or obsessive attraction to her older brother. Perhaps because he protects her
. Or maybe because he's the only man in her life that she feels safe with.
Sometimes it's suggested that it's not so much that she wants
him. Rather that she doesn't want to lose her brother to all those other girls who are stealing him away from her- so she decides she'll provide her brother with whatever it is he seems to want from other girls. This is still rather squicky
, but might be a little closer to the innocence of Father, I Want to Marry My Brother
. Sometimes might be part of a Token Mini-Moe
May or may not be a factor with a Little Sister Heroine
Anime and Manga
- Belarus from Axis Powers Hetalia takes this to hilariously dangerous levels. She wants to marry her brother, Russia. She's also Russia's Ax-Crazy Stalker with a Crush, going so far as to hunt him down with knives and break down a door when he barricades himself in an attempt to hide from her. South Korea has a similar if less violent complex with his older brothers China and Japan, especially the former, constantly attempting to grope them; they see him as the Annoying Younger Sibling and want nothing to do with him, while he refuses to accept that they don't like him.
- In Magikano, Maika has a huge complex regarding her big brother Haruo. She's always showering him with affection, hiding in his closet and watching him sleep, trying to bathe him, modelling lingerie for him to see (even wearing it on top of her school uniform to give him a little preview), and attempting to drive away any and all other female attention from him.
- Yoh Takami in Deadman Wonderland is called a "sister-complex freak!" by his sister Minatsuki. Given that they're in prison and DW is a Seinen series, this could be either Pet the Dog or Squick or both, considering what how sadistic his sister is.
- From the Nasuverse is Azaka of Kara no Kyoukai, which is fitting given that Akiha is something of an Expy of her. Azaka is in love with her brother Mikiya, and left to live with their uncle and attended a different school in the hopes that he would think of her as something other than a little sister.
- Many characters in Tenjho Tenge remark on Maya's Big Brother Attraction regarding Shin. It's almost to the point of Brother-Sister Incest.
- In Revolutionary Girl Utena, Nanami lets everybody know that her big brother Touga is the best. She is so obsessed with being onii-sama's sole target of attention that she got rid of his kitten and humiliates a girl from her Girl Posse. After realizing what a Manipulative Bastard her brother is, we see how her hopeless devotion to him is actually quite tragic.
- Oniichan Control. The little sister openly admits to people she barely knows how in love she is with her big brother. Played for some combination of horror and laughter at how over-the-top it all is.
- The Yandere No Onna No Ko Drama CD series is based on this + Axe Crazy. The listener is in the position of "onii-chan" (the big brother), and gets to listen as the various little sisters explain in detail just how crazy they are.
- Might be the case with Kotomi in Seitokai Yakuindomo. She likes invoking Brother-Sister Incest (especially in the yonkoma), Episode 12 has her admitting that she had an incestuous dream, and she also mentions that she and her brother Tsuda sometimes get mistaken for a couple, which she plays up. When her friend notes that it's sometimes hard to believe the two are related because of their very different personalities, Kotomi gets excited and interprets the comment as a possibility that they might be Not Blood Siblings.
- Kotomi also has no problem taking her clothes off in front of her brother◊ and once proudly mentioned to the other girls that he's also "impressive down there," which has him wondering as to when the hell she managed to sneak a peek.
- Imouto Wa Shishunki (My Little Sister is Going Through Puberty), made by the same mangaka as Seitokai Yakuindomo, has a little sister who makes extremely perverted statements around her big brother and has constantly hinted in a blatant manner that she wants to do more than sisterly things with him.
- Although Haru and Sora from Yosuga no Sora are actually the same age, they are commonly referred to as 'older brother' and 'younger sister', and Sora otherwise exhibits this trait very well. Haru is a bit more receptive than most examples here, though.
- In Witch Craft Works, Takamiya's sister has a blatant crush on him, but she's in denial, claiming her actions are just her right as a little sister. Hilarity Ensues.
- Code Geass has it's own page on the incestuous subtext between siblings, with Nunnally and Lelouch being the most obvious example.
- Urusei Yatsura: Asuka Mizunokuji, younger sister of baseball-nut Tobimaro and his rival Mendo's fiancee, was raised in isolation due to family tradition and as a result she's terrified of the mysterious, monstrous man-folk (not that she should be, she's one of the strongest human characters in the series). Because she was told that "big brothers are the best kind of men", Asuka fell in love with Tobimaro, who is squicked out of his mind but can't do a lot about it because Asuka is genuinely (if hilariously) screwed-up due to how... specially she was raised. She eventually does fall for Mendo... after it's explained that he's a big brother too.
- Freezing: She calls him "Onii-sama" but Ouka Tenjouin is actually Kazuya's cousin and she's gonna marry him no matter what. In an unusually assertive move the Nice Guy Kazuya tells her to her face, in front of her team and his love interest (and her rival) Satellizer, that he doesn't love her like that, he doesn't want to be their grandfather's "toys", and he wants her to be happy. The girl's response is that she does love him, he will make her happy, and most importantly their grandfather's word is law.
- Onii-chan Dakedo Ai Sae Areba Kankeinai yo ne! / He's my brother, but as long as we're in love it shouldn't matter, right?
- Miyuki in Mahouka Koukou no Rettousei is practically clinging at her brother almost all the time.
- In Sakurasou no Pet na Kanojo, Yuko seems to have it towards her big brother Sorata.
- Koi Kaze: "I do NOT have a brother complex!" Ah, but she does.
- The OAV adaptation of the hentai game Ko-ko-ro... features quite the literal example, as Asuka Kuonji treats her brother, Souji, as if he were her boyfriend instead of her brother. When they are out in public together, she is affectionate and clingy with him, which, of course, is shocking to everyone around town (who apparently know that they are siblings). Souji and Asuka have sex regularly, until he begins having a relationship with his teacher, Mizuki. Asuka, of course, is not happy with this development.
- In Oreimo, Kirino always wanted to marry her brother since she was a little girl. They eventually start dating and hold a fake wedding. They do break up and say they will be normal siblings though it is implied that they are still secretly together at the end of the novel.
- Diana in the first series of Jewelpet has a pretty obvious, but not too explicit, crush on her brother Dian. She fangirls extensively over him and wistfully fantasizes about living like a married couple. Dian never responds to this.
- Jackie from The House of Yes goes beyond finding her brother attractive. The two of them actually had an affair in the past.
Live Action TV
- Done in the Darkover series with Stormqueen! Everyone's already disturbed by the father suggesting he marry off his daughter to her half-brother as a way to resolve an inheritance crisis, but then Dorilys starts to get into the idea, and Donal gets used to it...
Mythology and Religion
- In The Borgias, Lucrezia and Cesare seem a little too close, with her saying that she will never love her husband as much as she loves him. Cesare seems to reciprocate, saying that if her husband proves "ungallant", "I will cut out his heart with a dinner knife, and serve it to you", in a very low, breathy whisper, while nearly giving her a Headbutt of Love, and this is just after he has carried her up to her bed on her wedding day. Given the historical characters they're based on, though, it would be surprising if there wasn't a lot of incestuous implications in the show.
- In Season 3 Episode 3 they explicitly consummate their attraction, finally moving away from the "subtext" and into straightforward "text".
- A two-part episode of CSI: Crime Scene Investigation focused on this. In the first part, she manages to create enough doubt that her brother committed a murder (that he actually did commit) at her own expense, but also leaving enough holes that she couldn't possibly be the murderer either. In the second episode, she murders his girlfriend and frames him for it, partly to get rid of the obstacle and partly because she figures that by visiting him in prison every day, he'll fall in love with her.
- In Degrassi Takes Manhattan there is a rivalry between Holly J. and Fiona for the affections of Declan who is Fiona's twin brother and Holly J.'s boyfriend. Fiona's attitude is "Boyfriends are temporary. Brothers are forever." She has an emotional dependency on Declan and couldn't stand to come second in his life which she makes clear to a whole party of people.
- In The Bible, Dinah either has an affair with, or is raped by, a man called Prince Shechem, who then agrees to marry her. However, two of Dinah's brothers, Simeon and Levi, instead go to war against Shechem and kill him. In one Jewish legend Dinah, angry and fearing that she was Defiled Forever without her fiancÚ, demands that Simeon marry her. He formally does but never sleeps with her. (This is the interpretation of a later verse, when it mentions "Saul, the son of the Canaanite woman" [Dinah] being a member of his household.)
- In one Arthurian legend a princess falls in love with her brother. A demon offers to make the prince love her back, as long as the princess and demon sleep together. Instead the princess gets pregnant and the demon turns her love for her brother into hatred, so that she accuses him of raping her. He is executed, but first declares his innocence and predicts that his sister will give birth to a monster. Indeed, her child winds up being the Questing Beast.
- Albedo from Xenosaga has a huge Big Brother Attraction with his twin, Junior. He becomes something of a Stalker with a Crush towards him, and was shown to have gone crazy due to the revelation that he wouldn't be able to stay together with him forever.
- The original version of the bishoujo game Ko-ko-ro... depicts an incestuous relationship between Souji Kuonji and his sister Asuka. Asuka seems more invested in the relationship than Souji; she even fantasizes about marrying Souji and having sex with him before they even leave the church where they were wed.
- The multiple depictions of incest in Ko-ko-ro... within and outside of the Kuonji family caused enough of an uproar that the game was banned from the Japanese market. An unauthorized edited version was later released, in which Asuka and Souji were no longer presented as blood siblings, but instead as stepsiblings. This was further edited when the game was adapted into a 2-part OAV; here, Souji is shown in flashback to have been an orphan adopted (and later molested) by the Kuonji family.
- In BlazBlue, it sure sucks to be in Ragna's shoes for having a younger brother Jin who not only wants to kill him, but was also obsessively lust after him to the point he will inflict physical harm or even kill those who he deems will take his "niisan" away from him e.g. Saya and Noel. However, it's also implied (to the point that it's all but outright stated) that Jin's obsession isn't natural: it's a product of being utterly Mind Raped by the Big Bad, Yuki Terumi, who needs Ragna to hate him as much as possible for as many reasons as possible so that he can continue living.
- Never actually happens in Little Busters!, but Kyousuke jokingly references this trope a couple of his nicknames for when Rin loses against him:
Kyousuke: This will be your name from now on: 'Her first crush looked like her older brother!'
Rin: I don't want that, moron!
- Akiha from Tsukihime is attracted to her older brother, though she usually hides it under antagonistic behavior. Though they're Not Blood Siblings.
- Notably, she's the only heroine with endings that has no "Good End". Either Shiki dies (the True End), or she becomes a vegetable (the Normal End). A side-story in Kagetsu Tohya following Akiha's True End reveals that he is still alive, though.
- Ange really seems to border on this in Umineko: When They Cry, which is parodied in the side stories of Tsubasa and the various manga omake. In the manga of Episode 4, she makes a complete fixation on Battler whenever she remembers her family. The implications are probably attenuated by the fact that Battler left the family shortly before her birth (and, indirectly, because of it, though he still adored her) and only visited her on her birthdays before coming back to the family and "dying" in the Rokkenjima incident, so they didn't have much of a brother-sister relationship (she was only 6 years old at the time). There is also the fact that they she's "only" his half-sister. Until we learn that Kyrie is Battler's real mother, so they are actually fully blood-related.
- Sayu in the original Death Note Abridged by TioH and Dargonakis. Who isn't particularly subtle about it.
- On Phineas and Ferb, this is one interpretation of Suzy to her older brother Jeremy. If nothing else she seems to fit the "doesn't want to lose him" model, as she's fiercely jealous of Candace becoming his new "favorite girl".
- A really disturbing example comes from Avatar: The Last Airbender with Azula's relationship to Zuko. She has quite a lot of No Yay with pretty much everyone she encounters, but that infamous scene where Zuko confronts her about one of her latest schemes and she answers by acting as close to The Vamp as a PG show could get really drives the point home. There is also something extremely Yandere-ish in her Villainous Breakdown. This is an unusual example of this trope because they frequently fight each other with the intention of doing serious harm/killing each other, and despite being younger, she is the stronger one in terms of intelligence, fighting skill and her father's affection, and thus her Incest Subtext-laden interactions with Zuko have her occupying the creepily possessive and domineering position of a Domestic Abuser.