History Main / NotBloodSiblings

25th May '16 9:24:10 AM Willbyr
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* Has the heck spoofed out of it in ''NininGaShinobuden'' (a.k.a. ''Ninja Nonsense''), where one of the main characters, a yellow Pac-Man-esque anthropomorphic football who is really a Ninja Elder refers to this particular trope and, being a pervert, has a particular high esteem. "If the Master says there is a cute little non-blood related sister, there IS a non-blood related sister."

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* Has the heck spoofed out of it in ''NininGaShinobuden'' ''Manga/NininGaShinobuden'' (a.k.a. ''Ninja Nonsense''), where one of the main characters, a yellow Pac-Man-esque anthropomorphic football who is really a Ninja Elder refers to this particular trope and, being a pervert, has a particular high esteem. "If the Master says there is a cute little non-blood related sister, there IS a non-blood related sister."
13th Apr '16 10:01:54 AM 20person
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* ''Literature/ASongOfIceAndFire'' has this a lot, mostly due to the Westerosi custom of fostering their children. Romances between foster-siblings aren't considered anything out of the ordinary and are often encouraged. Kids are usually tweens by the time they're fostered out, and view their foster-siblings as peers and friends, not siblings.

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* ''Literature/ASongOfIceAndFire'' has this a lot, mostly due to the Westerosi custom of fostering their children. Romances between foster-siblings aren't considered anything out of the ordinary and are often encouraged.encouraged, as it makes the ArrangedMarriage that comes after [[PerfectlyArrangedMarriage a lot easier]] to go through with. Kids are usually tweens by the time they're fostered out, and view their foster-siblings as peers and friends, not siblings.
9th Apr '16 3:51:15 PM Brainiac0982
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** Doable in ''VideoGame/FireEmblemFates'' if Kamui marries any of his/her siblings from Nohr, since they were merely raised together and not biologically related [[spoiler: or his/her Hoshidan siblings, since it turns out they're not related either.]]

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** Doable in ''VideoGame/FireEmblemFates'' if Kamui Corrin marries any of his/her siblings from Nohr, since they were merely raised together and not biologically related [[spoiler: or his/her Hoshidan siblings, since it turns out they're not related either.]]
27th Mar '16 5:52:39 AM Morgenthaler
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* In ''Series/TheSarahConnorChronicles'', as far as the rest of the world is concerned, Cameron is John's sister. The sexual tension, by the way, is ''palpable''.

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* In ''Series/TheSarahConnorChronicles'', ''Series/TerminatorTheSarahConnorChronicles'', as far as the rest of the world is concerned, Cameron is John's sister. The sexual tension, by the way, is ''palpable''.
20th Mar '16 2:32:17 PM Eievie
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* ''Series/TheFosters'': Callie and Brendan are foster siblings rather than step siblings, but they follow this trope to a T; they even [[SecretRelationship date secretly at one point.]] Because they're the FanPreferredCouple, the show-writers do everything within their power to prevent Callie's adoption papers from being finalized and making their sexual tension officially incestuous.

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* ''Series/TheFosters'': Callie and Brendan are foster siblings rather than step siblings, but and they follow this trope to a T; they even [[SecretRelationship date secretly at one point.]] Because they're the FanPreferredCouple, the show-writers do everything within their power to prevent Callie's adoption papers from being finalized and making their sexual tension officially incestuous.
20th Mar '16 2:28:33 PM Eievie
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* ''Series/TheFosters'': Callie and Brendan are foster siblings rather than step siblings, but they follow this trope to a T; they even [[SecretRelationship date secretly at one point.]] Because they're the FanPreferredCouple, the show-writers do everything within their power to prevent Callie's adoption papers from being finalized and making their sexual tension officially incestuous.



:: Because AllAbusersAreMale and /DoubleStandardRapeFemaleOnMale, it's assumed that Toby was the [[SexualExtortion perpetrator]]. He wasn't.

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:: ::: Because AllAbusersAreMale and /DoubleStandardRapeFemaleOnMale, DoubleStandardRapeFemaleOnMale, it's assumed that Toby was the [[SexualExtortion perpetrator]]. He wasn't.
20th Mar '16 1:59:58 PM Eievie
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->''"We were raised side by side, but he was actually adopted so technically it's OK that I'm also attracted to him."''

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->''"We were raised side by side, but he he was actually adopted so technically it's OK that I'm also attracted to him."''



* In the OVA adaptation of the bishoujo game ''Ko-ko-ro...'', Souji is shown in flashback to be adopted by the Kuonji family. This is apparently not lost on his younger sister, Asuka; though she addresses Souji as “Aniki” (Japanese for “older brother”), she regularly initiates intercourse with him and secretly watches him having sex with other girls in his bedroom.

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* In the OVA adaptation of the bishoujo game ''Ko-ko-ro...'', Souji is shown in flashback to be adopted by the Kuonji family. This is apparently not lost on his younger sister, Asuka; though she addresses Souji as “Aniki” "Aniki" (Japanese for “older brother”), "older brother"), she regularly initiates intercourse with him and secretly watches him having sex with other girls in his bedroom.



* The ''Franchise/StarWars'' fanfic "Father and Son" has Han and Leia as a couple (as in canon)... despite the fact that her (and Luke's) birth parents adopted and raised Han for several years before the twins were born. Somehow, nobody (not even Vader or Padme's extended family on Naboo) sees anything wrong with the two being a couple. (Admittedly, all three siblings were sent to separate planets after Anakin's FaceHeelTurn and Padme's DeathByChildbirth, and didn't find out about their being siblings until after they were all adults. But still.)

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* The ''Franchise/StarWars'' fanfic "Father and Son" has Han and Leia as a couple (as in canon)... canon) despite the fact that her (and Luke's) birth parents adopted and raised Han for several years before the twins were born. Somehow, nobody (not even Vader or Padme's extended family on Naboo) sees anything wrong with the two being a couple. (Admittedly, all three siblings were sent to separate planets after Anakin's FaceHeelTurn and Padme's DeathByChildbirth, and didn't find out about their being siblings until after they were all adults. But still.)






* In the Lord John Gray spinoffs of Diana Gabaldon's ''Literature/{{Outlander}}'' series, the main character finds out that his new stepbrother was a guy he used to sleep with. It's awkward, but that apparently doesn't last long, and they're promptly back together. Which is OK, except for the fact that they're living in the 18th century and hence have the appropriate [[EternalSexualFreedom awkwardness]]. (There was CharacterDevelopment in there somewhere, but it still managed to {{squick}} some readers...).

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* In the Lord John Gray spinoffs of Diana Gabaldon's ''Literature/{{Outlander}}'' series, the main character finds out that his new stepbrother was a guy he used to sleep with. It's awkward, but that apparently doesn't last long, and they're promptly back together. Which is OK, ok, except for the fact that they're living in the 18th century and hence have the appropriate [[EternalSexualFreedom awkwardness]]. (There was CharacterDevelopment in there somewhere, but it still managed to {{squick}} some readers...).readers…).



* ''Literature/DoctorZhivago'': Zhivago and Tonya, as mentioned above, also hit it off in the book. Although Zhivago's [[TheDulcineaEffect eyes are set on someone else]]...

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* ''Literature/DoctorZhivago'': Zhivago and Tonya, as mentioned above, also hit it off in the book. Although Zhivago's [[TheDulcineaEffect eyes are set on someone else]]...else…]]



* ''ASongOfIceAndFire'' has this a lot, mostly due to the Westerosi custom of fostering their children. Romances between foster-siblings aren't considered anything out of the ordinary and are often encouraged:
** Petyr Baelish played "kissing games" with both his foster-sisters, Catelyn and Lysa Tully. He eventually fought an (unsuccessful) duel for Catelyn's hand [[spoiler: and later married Lysa.]]
** Tyrion Lannister invokes this deliberately by sending his 9-year-old niece Myrcella Baratheon to live with her fiance, [[spoiler: 11-year-old Trystane Martell]], years before they will be old enough to marry.
** Quentyn Martell mentions that there was a general expectation that he would marry his foster-sister, Gwynth Yronwood. [[spoiler: He doesn't, but it would probably have been better for him if he had...]]
** ''Another'' example can be found in Theon Greyjoy. Although they never interact in-series, he remarks several times that he'd hoped to marry his foster sister Sansa Stark, even though he knew it would never happen. [[spoiler: Later, when he takes Winterfell, he thinks that, if she weren't in King's Landing, [[AndNowYouMustMarryMe he might have forced her to marry him to secure his hold on the castle]].]] Made somewhat {{squick}}y since, the last time he saw her, he was nineteen and she was eleven, and she's only two years older now.

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* ''ASongOfIceAndFire'' ''Literature/ASongOfIceAndFire'' has this a lot, mostly due to the Westerosi custom of fostering their children. Romances between foster-siblings aren't considered anything out of the ordinary and are often encouraged:
encouraged. Kids are usually tweens by the time they're fostered out, and view their foster-siblings as peers and friends, not siblings.
** Petyr Baelish played "kissing games" with both his foster-sisters, Catelyn and Lysa Tully. He eventually fought an (unsuccessful) duel for Catelyn's hand [[spoiler: and hand--[[spoiler:and later married Lysa.]]
** Tyrion Lannister invokes this deliberately by sending his 9-year-old niece Myrcella Baratheon to live with her fiance, fiancé, [[spoiler: 11-year-old Trystane Martell]], years before they will be old enough to marry.
** Quentyn Martell mentions that there was a general expectation that he would marry his foster-sister, Gwynth Yronwood. [[spoiler: He doesn't, but it would probably have been better for him if he had...]]
had…]]
** ''Another'' example can be found in Theon Greyjoy. Although Greyjoy--although they never interact in-series, he remarks several times that he'd hoped to marry his foster sister Sansa Stark, even though he knew it would never happen. [[spoiler: Later, when he takes Winterfell, he thinks that, if she weren't in King's Landing, [[AndNowYouMustMarryMe he might have forced her to marry him him]] to secure his hold on the castle]].castle.]] Made somewhat {{squick}}y since, the last time he saw her, he was nineteen 19 and she was eleven, 11, and she's they're only two years 2 older now.



* Arthur and Morgana in ''Series/{{Merlin|2008}}''. Morgana was raised as the ward of Arthur's father Uther. No expressed romantic interest on either side, but definite sparks. Then in "The Crystal Cave," it is revealed that [[spoiler:they ''are'' blood siblings]]! Though technically, that's been an ItWasHisSled for several hundred years now.

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* Arthur and Morgana in ''Series/{{Merlin|2008}}''. Morgana was raised as the ward of Arthur's father Uther. No expressed romantic interest on either side, but definite sparks.sparks and ShipTease. Then in "The Crystal Cave," it is revealed that [[spoiler:they ''are'' blood siblings]]! Though technically, that's been an ItWasHisSled for several hundred years now.



* In ''Series/PrettyLittleLiars'', this is Jenna's justification for why it is not wrong for her and Toby to be lovers; when he doesn't accept that, she [[SexualExtortion coerces him into her bed]].

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* In ''Series/PrettyLittleLiars'', this is Jenna's justification for why it is not wrong for her *''Series/PrettyLittleLiars'': Stepsiblings Jenna Marshall and Toby to be lovers; when he doesn't accept that, Cavanaugh.
-->'''Aria:''' Toby and Jenna had a relationship.\\
'''Spencer:''' Way beyond step-siblings.\\
'''Aria:''' Yeah, they… were involved.\\
'''Emily:''' Romantically?\\
'''Spencer:''' I doubt I'd call it ''romantic''--I doubt
she had much of a choice.
:: Because AllAbusersAreMale and /DoubleStandardRapeFemaleOnMale, it's assumed that Toby was the
[[SexualExtortion coerces him into her bed]].perpetrator]]. He wasn't.
-->'''Jenna:''' You need to be home. Where you're safe.\\
'''Toby:''' You could chain me to this porch and I'd still never touch you like that again.
20th Mar '16 12:26:14 PM Eievie
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This trope is often related (but [[AccidentalPun not by blood]], of course) to FlirtyStepsiblings and LittleSisterHeroine. Needless to say, these tropes tend to gross out anyone who actually ''has'' stepsiblings.

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This trope is often related (but [[AccidentalPun not by blood]], of course) to FlirtyStepsiblings and LittleSisterHeroine. Needless to say, these LittleSisterHeroine.

As for reality, it depends. These
tropes tend to gross out anyone who actually ''has'' stepsiblings.
has been raised alongside their stepsiblings. If they met as teens or later, though, it can seem unfair that their parents got got together before they did.



* ''[=KissXsis=]'' runs on this trope. Keita's twin step-sisters compete with each other for his affections, much to his dismay. His parents not only are aware of this, but actively encourage him to go for one of the girls, constantly reminding him that 'it's not by blood, so it's OK!'

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* ''[=KissXsis=]'' runs on this trope. Keita's twin step-sisters stepsisters compete with each other for his affections, much to his dismay. His parents not only are aware of this, but [[ShipperOnDeck actively encourage him to go for one of the girls, girls]], constantly reminding him that 'it's "it's not by blood, so it's OK!'OK!"



* ''Completely'' inverted in ''Manga/KoiKaze,'' where Koshiro and Nanoka develop an attraction for each other and then find out they ''are'' blood siblings who haven't seen each other in 10 years. The story revolves around how they cope -- or not -- with the fact that they can't get over their feelings for each other. In fact, ''Koi Kaze'' uses the [[http://en.wikipedia.org/wiki/Genetic_sexual_attraction documented phenomenon]] of "genetic sexual attraction" as a factor in Koshiro and Nanoka's interactions.

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* ''Completely'' inverted in ''Manga/KoiKaze,'' where Koshiro and Nanoka develop an attraction for each other and then find out they ''are'' blood siblings who haven't seen each other in 10 years. The story revolves around how they cope -- or not -- with cope--or not--with the fact that they can't get over their feelings for each other. In fact, ''Koi Kaze'' uses the [[http://en.wikipedia.org/wiki/Genetic_sexual_attraction documented phenomenon]] of "genetic sexual attraction" as a factor in Koshiro and Nanoka's interactions.



** Averted with [[spoiler:Norway and Iceland]] - the latter's "DNA testing results" (archaeological excavation) prove that they are, in fact, related.

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** Averted with [[spoiler:Norway and Iceland]] - the Iceland]]--the latter's "DNA testing results" (archaeological excavation) prove that they are, in fact, related.



** In ''Manga/{{Spiral}}'', Ayumu is strongly hinted in the anime and confirmed in the manga to be in love with his sister-in-law. Inverted with [[BelligerentSexualTension Kousuke and Ryouko]], who have blatant ShipTease much before we learn (in the manga only) that they're actually half-siblings -- but ''they'''ve always known it, and though they've been raised apart, it has always been an obstacle to their relationship. (They eventually do make it to OfficialCouple status.)

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** In ''Manga/{{Spiral}}'', Ayumu is strongly hinted in the anime and confirmed in the manga to be in love with his sister-in-law. Inverted with [[BelligerentSexualTension Kousuke and Ryouko]], who have blatant ShipTease much before we learn (in the manga only) that they're actually half-siblings -- but half-siblings--but ''they'''ve always known it, and though they've been raised apart, it has always been an obstacle to their relationship. (They eventually do make it to OfficialCouple status.)



* In ''Manga/SaikinImoutoNoYousuGaChottoOkashiindaGa'', the ghost Hiyori Kotobuki often possesses Mitsuki Kanzaki and uses her body to hit on Mitsuki's step-brother Yuya. Mitsuki finds this disgusting and humiliating, constantly managing to force Hiyori out of her body. However, as time goes on, she starts fantasizing about and blushing around Yuya even when Hiyori is not there, and getting jealous of any girls that get close to him. Yuya is confused about the whole thing, thinking Mitsuki has a split personality.

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* In ''Manga/SaikinImoutoNoYousuGaChottoOkashiindaGa'', the ghost Hiyori Kotobuki often possesses Mitsuki Kanzaki and uses her body to hit on Mitsuki's step-brother stepbrother Yuya. Mitsuki finds this disgusting and humiliating, constantly managing to force Hiyori out of her body. However, as time goes on, she starts fantasizing about and blushing around Yuya even when Hiyori is not there, and getting jealous of any girls that get close to him. Yuya is confused about the whole thing, thinking Mitsuki has a split personality.



* ''Manga/SensualPhrase'' has Atsuro in a relationship with his sister Yuka. Their exposed relationship even causes a scandal, but Atsuro casually reveals to the press that they are step-siblings.

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* ''Manga/SensualPhrase'' has Atsuro in a relationship with his sister Yuka. Their exposed relationship even causes a scandal, but Atsuro casually reveals to the press that they are step-siblings.stepsiblings.



* A disturbing example in ''Anime/KillLaKill'', where a brainwashed [[spoiler:Ryuko]] has a threesome with [[ParentalIncest her mother Ragyo]] and her step-sister Nui Harime. [[spoiler:Ryuko]] then gives Nui a goodbye kiss later. Of course, [[spoiler:Ryuko]] is not pleased when she is freed from the brainwashing.

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* A disturbing example in ''Anime/KillLaKill'', where a brainwashed [[spoiler:Ryuko]] has a threesome with [[ParentalIncest her mother Ragyo]] and her step-sister stepsister Nui Harime. [[spoiler:Ryuko]] then gives Nui a goodbye kiss later. Of course, [[spoiler:Ryuko]] is not pleased when she is freed from the brainwashing.



* ''Manga/{{Citrus}}'' revolves around two step-sisters who fall in love. A good deal of the conflict is due to them trying to be familial but also being attracted to each other.

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* ''Manga/{{Citrus}}'' revolves around two step-sisters stepsisters who fall in love. A good deal of the conflict is due to them trying to be familial but also being attracted to each other.



* In ''Comicbook/XMen'' comics, ComicBook/{{Nightcrawler}}'s "true love" is his adoptive sister Amanda Sefton, even though they were raised together since infancy. They actually did officially get together, late in ''Comicbook/{{Excalibur}}'s'' original run (and was portrayed as a bad idea - not because of their prior relationship, but because Amanda was portrayed as not-quite-right in the head). Nightcrawler (as Mystique's blood son) and Rogue (as her adopted daughter) have potential for this, as well. Which if it happened would be less potentially squicky than Amanda; they never even met until adulthood. He still flirts shamelessly with her.

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* In ''Comicbook/XMen'' comics, ComicBook/{{Nightcrawler}}'s "true love" is his adoptive sister Amanda Sefton, even though they were raised together since infancy. They actually did officially get together, late in ''Comicbook/{{Excalibur}}'s'' original run (and was portrayed as a bad idea - not idea--not because of their prior relationship, but because Amanda was portrayed as not-quite-right in the head). Nightcrawler (as Mystique's blood son) and Rogue (as her adopted daughter) have potential for this, as well. Which if it happened would be less potentially squicky than Amanda; they never even met until adulthood. He still flirts shamelessly with her.



* Derek and Casey of ''LifeWithDerek'' is a non-canon ship that's largely popular with the fanbase, as opposed to all the other love interests that are introduced throughout the series. The fact that half of the show focuses on the interactions and the relationship between the two step-siblings doesn't help.

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* Derek and Casey of ''LifeWithDerek'' is a non-canon ship that's largely popular with the fanbase, as opposed to all the other love interests that are introduced throughout the series. The fact that half of the show focuses on the interactions and the relationship between the two step-siblings stepsiblings doesn't help.



* In the GenderFlip-based ''[[{{Daria}} John Lane]]'' fanfic series, this happens in a more justified situation -- After Helen learns how totally neglectful John's parents are, she takes them to court and takes custody of John Lane, who at that point is already in a budding relationship with Daria.

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* In the GenderFlip-based ''[[{{Daria}} John Lane]]'' fanfic series, this happens in a more justified situation -- After situation--after Helen learns how totally neglectful John's parents are, she takes them to court and takes custody of John Lane, who at that point is already in a budding relationship with Daria.



* The Spanish movie ''[[http://www.imdb.com/title/tt0133363/ Los Amantes Del Círculo Polar]]'' extends this trope from FlirtyStepSiblings in that Otto's divorced father marries Ana's widowed mother first when the two children are just ten years old. Then, as they are living together in the same house, a teen romance gradually develops between Ana and Otto into a full-blown sexual relationship which, however, they manage to keep completely secret from their parents/step-parents to the end. Curiously, the possibility that the relationship between two opposite-sex step-siblings could ever go beyond familial love never does seem to occur to either of their parents/step-parents or much of anyone else, which is why the two are able to conceal their nightly liaisons from them so easily.

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* The Spanish movie ''[[http://www.imdb.com/title/tt0133363/ Los Amantes Del Círculo Polar]]'' extends this trope from FlirtyStepSiblings in that Otto's divorced father marries Ana's widowed mother first when the two children are just ten years old. Then, as they are living together in the same house, a teen romance gradually develops between Ana and Otto into a full-blown sexual relationship which, however, they manage to keep completely secret from their parents/step-parents parents/stepparents to the end. Curiously, the possibility that the relationship between two opposite-sex step-siblings stepsiblings could ever go beyond familial love never does seem to occur to either of their parents/step-parents parents/stepparents or much of anyone else, which is why the two are able to conceal their nightly liaisons from them so easily.



* In ''Film/CruelIntentions'' the main character Sebastian is obsessed with his step-sister Kathryn, who uses the promise of sex to get him to help her with her revenge.

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* In ''Film/CruelIntentions'' the main character Sebastian is obsessed with his step-sister stepsister Kathryn, who uses the promise of sex to get him to help her with her revenge.



* Infamously [[InvertedTrope inverted]] in ''Film/ReturnOfTheJedi'' with Luke and Leia, with the revelation that they were the siblings...one movie after Leia kissed Luke on the lips in ''Film/TheEmpireStrikesBack''. [[http://weknowmemes.com/2013/10/the-exact-moment-luke-and-leia-found-out-they-were-twins/ Their actors' reactions tell the whole story]]. Leia's assertion that "Somehow, I've always known" just makes this worse.
* Actually brought up (in a non-sexual way) during ''Film/{{The Avengers|2012}}'': Thor is angry when the other Avengers start talking about how evil Loki is, claiming that "he's still of Asgard, and my brother." Upon hearing just how many people he'd killed in the past few days, he seems to take this back, saying "He's adopted."
* In ''Film/MrNobody'', Anna and Nemo are schoolmates who become step-siblings in their mid-teens and fall in love, much to their parents' dismay. Interestingly, Nemo is shown to have three love interests and Anna is [[spoiler: depicted as being the right girl for him]].

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* Infamously [[InvertedTrope inverted]] in ''Film/ReturnOfTheJedi'' with Luke and Leia, with the revelation that they were the siblings... one movie after Leia kissed Luke on the lips in ''Film/TheEmpireStrikesBack''. [[http://weknowmemes.com/2013/10/the-exact-moment-luke-and-leia-found-out-they-were-twins/ Their actors' reactions tell the whole story]]. story.]] Leia's assertion that "Somehow, I've always known" just makes this worse.
* Actually brought up (in a non-sexual way) during ''Film/{{The Avengers|2012}}'': Thor is angry when the other Avengers start talking about how evil Loki is, claiming that "he's still of Asgard, and my brother." Upon hearing just how many people he'd killed in the past few days, he seems to take this back, saying saying, "He's adopted."
* In ''Film/MrNobody'', Anna and Nemo are schoolmates who become step-siblings stepsiblings in their mid-teens and fall in love, much to their parents' dismay. Interestingly, Nemo is shown to have three love interests and Anna is [[spoiler: depicted as being the right girl for him]].



* The Cullens in Creator/StephenieMeyer's ''Literature/{{Twilight}}'' -- though all the "children" met as adults, and weren't raised together.

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* The Cullens in Creator/StephenieMeyer's ''Literature/{{Twilight}}'' -- though ''Literature/{{Twilight}}''--though all the "children" met as adults, and weren't raised together.



* Odd subversion in ''Literature/TheFirebringerTrilogy'': When hero Jan's father Korr flies into a rage over Jan's marriage to the healer's daughter Tek, Jan doesn't understand, until he finds out that [[spoiler:Tek's father was not the healer, but actually Korr. This in turn sends Jan into something of a Heroic BSOD, and when he sees Tek again and tells her what he has learned, they agree to renounce their marriage, believing themselves to be half siblings. Just before they actually do so, Jan's mother steps in and reveals that the pair aren't actually related by blood- Korr is not Jan's father after all.]]

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* Odd subversion in ''Literature/TheFirebringerTrilogy'': When hero Jan's father Korr flies into a rage over Jan's marriage to the healer's daughter Tek, Jan doesn't understand, until he finds out that [[spoiler:Tek's father was not the healer, but actually Korr. This in turn sends Jan into something of a Heroic BSOD, and when he sees Tek again and tells her what he has learned, they agree to renounce their marriage, believing themselves to be half siblings. Just before they actually do so, Jan's mother steps in and reveals that the pair aren't actually related by blood- Korr blood--Korr is not Jan's father after all.]]



* Even though VCAndrews' works are best known for BrotherSisterIncest, it's actually more common for the heroine to end up with a man she initially believes is her brother/half-brother/cousin until it's revealed that they are not actually blood-related, making it fine for them to marry each other. The best example of this is the Cutler series where Dawn learns that she's actually adopted and that Jimmy is hence not really her brother; Jimmy even expresses his relief about this as he was attracted to Dawn even when he thought they were related. (And just to top this all off, Dawn's original boyfriend Philip turns out to be her ''actual'' brother who remains obsessed with her after the truth of their relations comes out to [[LoveMakesYouEvil absolutely creepy levels]]. Got to love VC Andrews' wacky plots). Other examples are Heaven's daughter Annie and apparent half-brother Luke from the Casteel series, Melody and apparent cousin Cory from the Logan series (okay, it turns out they're [[KissingCousins still blood-related]] but only as second cousins, which makes marriage between them legal), and Rain and apparent brother Roy from the Hudson series (although they don't end up together, and there's that thing about Rain's own blood brother being attracted to her too - she doesn't end up with him either, thank goodness).

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* Even though VCAndrews' works are best known for BrotherSisterIncest, it's actually more common for the heroine to end up with a man she initially believes is her brother/half-brother/cousin until it's revealed that they are not actually blood-related, making it fine for them to marry each other. The best example of this is the Cutler series where Dawn learns that she's actually adopted and that Jimmy is hence not really her brother; Jimmy even expresses his relief about this as he was attracted to Dawn even when he thought they were related. (And just to top this all off, Dawn's original boyfriend Philip turns out to be her ''actual'' brother who remains obsessed with her after the truth of their relations comes out to [[LoveMakesYouEvil absolutely creepy levels]]. Got to love VC Andrews' wacky plots). Other examples are Heaven's daughter Annie and apparent half-brother Luke from the Casteel series, Melody and apparent cousin Cory from the Logan series (okay, it turns out they're [[KissingCousins still blood-related]] but only as second cousins, which makes marriage between them legal), and Rain and apparent brother Roy from the Hudson series (although they don't end up together, and there's that thing about Rain's own blood brother being attracted to her too - she too--she doesn't end up with him either, thank goodness).



* A VillainousIncest couple who actually produced a child in ''Literature/ABrothersPrice'' were considered [[BrotherSisterIncest siblings]] by the culture - marriages consist of one man, maybe two if they're lucky, and a band of sisters who are themselves descended from sisters, and all offspring from this marriage are considered to be siblings - but genetically are [[KissingCousins cousins]]. The social consideration overrode this trope and the couple were regarded with disgust and horror regardless of genes. The trope itself was used to point out that their child wasn't as poorly off as she could have been.

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* A VillainousIncest couple who actually produced a child in ''Literature/ABrothersPrice'' were considered [[BrotherSisterIncest siblings]] by the culture - marriages culture--marriages consist of one man, maybe two if they're lucky, and a band of sisters who are themselves descended from sisters, and all offspring from this marriage are considered to be siblings - but siblings--but genetically are [[KissingCousins cousins]]. The social consideration overrode this trope and the couple were regarded with disgust and horror regardless of genes. The trope itself was used to point out that their child wasn't as poorly off as she could have been.



* In the young adult novel ''Cluing In'' by Jo Ramsey, main character Jamey Mandel's parents, Tamara and Sam, are step-siblings; Tamara's father Victor is married to Sam's mother Martha. Somewhat subverted in that Tamara got pregnant with Jamey (at age 17) before she and Sam realized their parents even knew each other, and before Martha got pregnant by Victor. Victor and Martha got married before Tamara and Sam did, though.

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* In the young adult novel ''Cluing In'' by Jo Ramsey, main character Jamey Mandel's parents, Tamara and Sam, are step-siblings; stepsiblings; Tamara's father Victor is married to Sam's mother Martha. Somewhat subverted in that Tamara got pregnant with Jamey (at age 17) before she and Sam realized their parents even knew each other, and before Martha got pregnant by Victor. Victor and Martha got married before Tamara and Sam did, though.



* Things get very complicated in Ursula K [=Leguin=]'s "O" short stories: the people of O have four-person marriages called ''sedoretu'', but because humanity is divided into two categories (moieties) which you inherit from your mother, each man is only allowed to sleep with one of the women (and vice versa) - your partner must be from the other moiety. If you're a child of one partnership, the children of the other are your "germanes", and when you grow up, you're allowed to marry and sleep with your germane (who, after all, isn't even a half-sibling, but will have grown up living in the same house). A full brother and sister can also marry, but they won't be in the same sexual pairing as they'll have inherited the same moiety from their mother. Whether or not it's considered appropriate to marry your germane or sibling seems to vary depending on where you live. ItMakesSenseInContext - if you concentrate. Le Guin was the daughter of an Anthropologist and it shows.

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* Things get very complicated in Ursula K [=Leguin=]'s "O" short stories: the people of O have four-person marriages called ''sedoretu'', but because humanity is divided into two categories (moieties) which you inherit from your mother, each man is only allowed to sleep with one of the women (and vice versa) - your versa)--your partner must be from the other moiety. If you're a child of one partnership, the children of the other are your "germanes", and when you grow up, you're allowed to marry and sleep with your germane (who, after all, isn't even a half-sibling, but will have grown up living in the same house). A full brother and sister can also marry, but they won't be in the same sexual pairing as they'll have inherited the same moiety from their mother. Whether or not it's considered appropriate to marry your germane or sibling seems to vary depending on where you live. ItMakesSenseInContext - if ItMakesSenseInContext--if you concentrate. Le Guin was the daughter of an Anthropologist anthropologist and it shows.



** This trope is played around with Ultraman Ace and Taro - Whilst Ace is an orphan who was adopted by Taro's family, they have such a close brotherly relationship that they might as well be considered blood brothers.

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** This trope is played around with Ultraman Ace and Taro - Whilst Taro--whilst Ace is an orphan who was adopted by Taro's family, they have such a close brotherly relationship that they might as well be considered blood brothers.



* Subverted for all it's worth on ''Series/ArrestedDevelopment''. [[spoiler:Cousins George Michael and Maeby are attracted to each other and George Michael clings to any hope that Maeby isn't his Aunt Lindsay's daughter. When they find out that there's a chance she's been adopted, they go to second base... then they find out that she ''is'' Lindsay's daughter. As a result, Maeby begins dating a boy from school - Steve Holt. Meanwhile, Steve decides to find the father he never knew, who turns out to be GOB, Maeby's uncle. As a result, they break up. Then Maeby's mother Lindsay turns out to be adopted. Lindsay promptly starts hitting on George Michael's father, who is completely freaked out after thinking she was his twin for 37 years.]]

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* Subverted for all it's worth on ''Series/ArrestedDevelopment''. [[spoiler:Cousins George Michael and Maeby are attracted to each other and George Michael clings to any hope that Maeby isn't his Aunt Lindsay's daughter. When they find out that there's a chance she's been adopted, they go to second base... then they find out that she ''is'' Lindsay's daughter. As a result, Maeby begins dating a boy from school - Steve school--Steve Holt. Meanwhile, Steve decides to find the father he never knew, who turns out to be GOB, Maeby's uncle. As a result, they break up. Then Maeby's mother Lindsay turns out to be adopted. Lindsay promptly starts hitting on George Michael's father, who is completely freaked out after thinking she was his twin for 37 years.]]



* Not avoided in an episode of ''Series/CSIMiami'', where the father of a murdered woman's baby is discovered to be her brother: turns out they met and became step-siblings when their parents married (and the two kids were 18 at the time) and one thing led to another.
* Nate from ''Series/SixFeetUnder'' has an affair with his newly introduced step-sister. Nate is neither squicked by this fact nor the fact that he's screwing around on his wife with someone he's known for less than a month. This, plus Nate's [[{{Narm}} trope-naming Karmic Smackdown]] had Nate's portrayer, Peter Krause, not happy at all.
* On ''Series/TwoAndAHalfMen'', Charlie becomes sexually involved with the daughter of his mother's fiancé, repeatedly pointing out that she will only be his step-sister.

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* Not avoided in an episode of ''Series/CSIMiami'', where the father of a murdered woman's baby is discovered to be her brother: turns out they met and became step-siblings stepsiblings when their parents married (and the two kids were 18 at the time) and one thing led to another.
* Nate from ''Series/SixFeetUnder'' has an affair with his newly introduced step-sister.stepsister. Nate is neither squicked by this fact nor the fact that he's screwing around on his wife with someone he's known for less than a month. This, plus Nate's [[{{Narm}} trope-naming Karmic Smackdown]] had Nate's portrayer, Peter Krause, not happy at all.
* On ''Series/TwoAndAHalfMen'', Charlie becomes sexually involved with the daughter of his mother's fiancé, repeatedly pointing out that she will only be his step-sister.stepsister.



* On ''Series/{{Roseanne}}'', Darlene and David's relationship didn't start this way, but it became more and more the case as the series went on. When David was "adopted" (taken in) by the Conners, Roseanne let him know he could move in by walking in on David and Darlene kissing and cheerfully crying to Dan "Oh, look, honey, our kids are necking!" By the time they got married, Jackie opened the episode by saying "I can't believe our little Darlene is marrying...our little David," Mark scolded David for asking about their birth parents when the Conners were practically his parents, and David and Darlene paid tribute to "''our'' parents Dan and Roseanne Conner" in their wedding vows.

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* On ''Series/{{Roseanne}}'', Darlene and David's relationship didn't start this way, but it became more and more the case as the series went on. When David was "adopted" (taken in) by the Conners, Roseanne let him know he could move in by walking in on David and Darlene kissing and cheerfully crying to Dan Dan, "Oh, look, honey, our kids are necking!" By the time they got married, Jackie opened the episode by saying saying, "I can't believe our little Darlene is marrying...marrying... our little David," Mark scolded David for asking about their birth parents when the Conners were practically his parents, and David and Darlene paid tribute to "''our'' parents Dan and Roseanne Conner" in their wedding vows.



* Perhaps the most sick and overly complicated example imaginable on ''Series/{{Passions}}''. Chad who is biracial comes to town and eventually dates Whitney the son of Eve and TC (the only black family in town). Chad is for several years hinted to be the son of Eve and her white lover Julian from before she was married. Later Chad and Whitney have a baby together and the revelation comes out that they are half-brother and half-sister and their baby was born from incest. Later is revealed that Chad is not really Eve and Julian's long lost son. It turns out Julian's father Alistair had raped Eve's adopted sister so yay Chad's son is not a product of incest but on the other hand Chad is a product of rape. Even later it is revealed that Chad is having a gay relationship on the down low with a guy named Vincent...who turns out to be Eve and Julian's hermaphroditic long lost child for realsies this time...oh and he's a serial killer and a rapist to boot. So yeah Chad didn't sleep with his half-sister...but he did sleep with his girlfriend's half-brother who was also his own half-nephew.
* A very strange example in ''Series/SixteenAndPregnant'' (and spin-off ''Teen Mom''): couple Catelynn and Tyler are step-siblings, because Catelynn's mom April and Tyler's father Butch are married. Butch and April met and married ''after'' their childen started dating.

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* Perhaps the most sick and overly complicated example imaginable on ''Series/{{Passions}}''. Chad who is biracial comes to town and eventually dates Whitney the son of Eve and TC (the only black family in town). Chad is for several years hinted to be the son of Eve and her white lover Julian from before she was married. Later Chad and Whitney have a baby together and the revelation comes out that they are half-brother and half-sister and their baby was born from incest. Later is revealed that Chad is not really Eve and Julian's long lost son. It turns out Julian's father Alistair had raped Eve's adopted sister so yay Chad's son is not a product of incest but on the other hand Chad is a product of rape. Even later it is revealed that Chad is having a gay relationship on the down low with a guy named Vincent... who turns out to be Eve and Julian's hermaphroditic long lost child for realsies this time...time... oh and he's a serial killer and a rapist to boot. So yeah Chad didn't sleep with his half-sister... but he did sleep with his girlfriend's half-brother who was also his own half-nephew.
* A very strange example in ''Series/SixteenAndPregnant'' (and spin-off ''Teen Mom''): couple Catelynn and Tyler are step-siblings, stepsiblings, because Catelynn's mom April and Tyler's father Butch are married. Butch and April met and married ''after'' their childen children started dating.



* ''VideoGame/TalesOfLegendia'', in which Senel and Shirley pretend to be brother and sister (arguably, they ''do'' rather act as though they are, but they certainly don't resemble the other in the slightest, and have different surnames, to boot) until they are exposed by the main villain as not being related at all -- in fact, each of them belongs to a different ''race'' altogether. Not too long after this, Shirley confesses to Senel that she is in love with him. They presumably end up engaged via the Rite of Feriyen by the end of the Main Quest ... although afterward, the other characters note that the relationship between them doesn't seem to have changed much at all (they even get new titles to reflect this; Senel obtains "Still A Brother" and Shirley obtains "Sister Girl").

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* ''VideoGame/TalesOfLegendia'', in which Senel and Shirley pretend to be brother and sister (arguably, they ''do'' rather act as though they are, but they certainly don't resemble the other in the slightest, and have different surnames, to boot) until they are exposed by the main villain as not being related at all -- in all--in fact, each of them belongs to a different ''race'' altogether. Not too long after this, Shirley confesses to Senel that she is in love with him. They presumably end up engaged via the Rite of Feriyen by the end of the Main Quest ...Quest... although afterward, the other characters note that the relationship between them doesn't seem to have changed much at all (they even get new titles to reflect this; Senel obtains "Still A Brother" and Shirley obtains "Sister Girl").



* The canonical routes in both ''VisualNovel/DaCapo'' games have always been about NotBloodSiblings, though the second game strayed into a fine line between this and KissingCousins for both Asakura sisters, since the protagonist is both adopted ''and'' raised by another parent - who, in turn, is another NotBloodSiblings with Asakura grandpa.
** Which makes his surrogate son - Yoshiyuki - the adopted distant ''uncle'' of the Asakura sisters, which make his relationship with either sister one generation apart... No wait, that't not right. Hmm... Try to wrap your head around the [[TangledFamilyTree family tree of this franchise]].

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* The canonical routes in both ''VisualNovel/DaCapo'' games have always been about NotBloodSiblings, though the second game strayed into a fine line between this and KissingCousins for both Asakura sisters, since the protagonist is both adopted ''and'' raised by another parent - who, parent--who, in turn, is another NotBloodSiblings with Asakura grandpa.
** Which makes his surrogate son - Yoshiyuki - the son--Yoshiyuki--the adopted distant ''uncle'' of the Asakura sisters, which make his relationship with either sister one generation apart... No wait, that't not right. Hmm... Try to wrap your head around the [[TangledFamilyTree family tree of this franchise]].



* Konstantin seems to think this is going on between Onii-chan and Kotone in ''[[http://www.tsunamichannel.com/index.php?date=2001-11-06&comic=ExCoKo Experimental Comic Kotone]]''. It isn't. What none of the characters except Kotone-chan herself and Onii-chan know is that Kotone is a RobotGirl -- the whole "little sister" thing is just a cover.

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* Konstantin seems to think this is going on between Onii-chan and Kotone in ''[[http://www.tsunamichannel.com/index.php?date=2001-11-06&comic=ExCoKo Experimental Comic Kotone]]''. It isn't. What none of the characters except Kotone-chan herself and Onii-chan know is that Kotone is a RobotGirl -- the RobotGirl--the whole "little sister" thing is just a cover.



* [[FlirtyStepsiblings Mickey and his step-sister Audrey]] on ''{{HomeSchooled}}''.

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* [[FlirtyStepsiblings Mickey and his step-sister stepsister Audrey]] on ''{{HomeSchooled}}''.



* On ''WesternAnimation/{{Gargoyles}},'' the title species lives in large clans that are considered to be a single family -- nobody keeps track of who their biological parents are, and thus all gargoyles of the same age group refer to each other as their "rookery brothers/sisters" and older members as their "rookery parents." WordOfGod says that real incest never occurs, though, because a) each female can only lay one egg per mating cycle and b) pheromones prevent [[KissingCousins Kissing Cousin]] relationships.

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* On ''WesternAnimation/{{Gargoyles}},'' the title species lives in large clans that are considered to be a single family -- nobody family--nobody keeps track of who their biological parents are, and thus all gargoyles of the same age group refer to each other as their "rookery brothers/sisters" and older members as their "rookery parents." WordOfGod says that real incest never occurs, though, because a) each female can only lay one egg per mating cycle and b) pheromones prevent [[KissingCousins Kissing Cousin]] relationships.



* At present, Japanese law allows for adopted siblings to marry, which has [[JidaiGeki feudal-era]] origins. Japanese family inheritance traditionally emphasize the transmission of family ''traditions'' rather than ''blood'', so at the time titles can only be transmitted to the title-holder biological or adopted ''son''; even nephews need to be adopted as an heir. This caused adoptions in feudal Japan to be as political as ArrangedMarriage, and many just do both-- adopting a child from another family as one's heir and have the latter marry his own daughter.

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* At present, Japanese law allows for adopted siblings to marry, which has [[JidaiGeki feudal-era]] origins. Japanese family inheritance traditionally emphasize the transmission of family ''traditions'' rather than ''blood'', so at the time titles can only be transmitted to the title-holder biological or adopted ''son''; even nephews need to be adopted as an heir. This caused adoptions in feudal Japan to be as political as ArrangedMarriage, and many just do both-- adopting both--adopting a child from another family as one's heir and have the latter marry his own daughter.



* The Roman emperor Tiberius married his step-sister Julia. Given that Julias father Augustus and Tiberius mother had already been together when Julia was born to Augustus first wife and Tiberius was already 14 at that time, it's still more than a bit squicky. But to their credit it wasn't their idea and and didn't last long.

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* The Roman emperor Tiberius married his step-sister stepsister Julia. Given that Julias Julia's father Augustus and Tiberius mother had already been together when Julia was born to Augustus first wife and Tiberius was already 14 at that time, it's still more than a bit squicky. But to their credit it wasn't their idea and and didn't last long.
16th Mar '16 7:06:51 PM TheBigBopper
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* In ''Anime/SwordArtOnline'', Suguha has had a very strong crush on her older ''brother'' Kazuto. This is justified as they are really [[KissingCousins first cousins]], not actual blood siblings.

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* In ''Anime/SwordArtOnline'', Suguha has had a very strong but secret crush on her older ''brother'' Kazuto. This is justified as they brother Kazuto (better known by his screen name Kirito). It's mentioned that Suguha's parents are really actually Kazuto's aunt and uncle, who adopted him into their family when his parents died in an accident, meaning that he and Suguha are actually [[KissingCousins first cousins]], not actual cousins]] rather than true blood siblings.
16th Mar '16 6:59:44 PM TheBigBopper
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* ''Manga/MarmaladeBoy'', although [[spoiler:Yuu does find some circumstantial evidence suggesting that they ''are'' blood siblings, and quickly breaks up with Miki, gets the hell out of town, and leaves them both to suffer. They finally conclude that they still love each other and want to get married, but their parents reveal that no, it was just a misunderstanding.]] The original [[WhatCouldHaveBeen proposed ending]] would have found them as siblings after all. They would have broken up in that ending, and Miki/Ginta and Yuu/Meiko would have formed.

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* In ''Manga/MarmaladeBoy'', although [[spoiler:Yuu does find Miki and Yuu's respective parents swap marriage partners, thus making their children step siblings. The kids fall in love with each other, and though they worry what their parents will think they don't see it as an insurmountable problem. [[spoiler:Drama ensues when Yuu discovers some circumstantial evidence suggesting that they ''are'' blood siblings, and quickly breaks up with Miki, gets the hell out of town, and leaves them both to suffer. They finally conclude that they still love each other and want to get married, but their parents reveal that no, it was just a misunderstanding.]] The original [[WhatCouldHaveBeen proposed ending]] would have found them as misunderstanding and they're not blood siblings after all. They would have broken up in that ending, and Miki/Ginta and Yuu/Meiko would have formed.all, making it a DoubleSubversion.]]
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