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* ''Manga/{{Beastars}}'': Being the LauncherOfAThousandShips, Legosi naturally gets this treatment quite a bit. Most infamously with his grandfather Gosha, but shipping Legosi with his mother Leano isn't unheard of either.
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* ''Manga/{{Beastars}}'': Being the LauncherOfAThousandShips, Legosi naturally gets this treatment quite a bit. Most infamously with his grandfather Gosha, Gosha (a CrackPairing so improbable and disturbing that it was used as a RunningGag 'most cursed possible ship' among the fandom until its sheer repeated mention meant people actually started getting genuinely curious about it), but shipping Legosi with his mother Leano isn't unheard of either.
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* ''Webcomic/HetaliaAxisPowers'': The very ship-happy fandom naturally has much of this, possibly influenced by Belarus' [[{{yandere}} behaviour toward her brother Russia]] being canon and Prussia acting borderline-flirty around his brother Germany (though Prussia [[MemeticMolester tends to flirt with almost everyone he encounters]]). Aside from the ''many'' cases of NotBloodSiblings being shipped, there are couples like:
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* ''Webcomic/HetaliaAxisPowers'': The very ship-happy fandom naturally has much of this, possibly influenced by Belarus' [[{{yandere}} [[{{Yandere}} behaviour toward her brother Russia]] being canon and Prussia acting borderline-flirty around his brother Germany (though Prussia [[MemeticMolester tends to flirt with almost everyone he encounters]]). Aside from the ''many'' cases of NotBloodSiblings being shipped, there are couples like:
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** Veneziano Italy and Romano Italy; since they represent different halves of Italy, they are technically half-brothers. The pairing is typically called Itacest, following along the lines of Germancest for Prussia and germany (or possibly predating the term).
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** Italy Veneziano and Italy and Romano Italy; Romano; since they represent different halves of Italy, they are technically half-brothers. brothers. The pairing is typically called Itacest, following along the lines of Germancest for Prussia and germany Germany (or possibly predating the term).
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* One of the most popular ships in ''Anime/NeonGenesisEvangelion'' is Shinji and Rei, since Rei is a the [[FirstGirlWins first girl Shinji encounters]], both of them are [[ShrinkingViolet soft spoken and quiet]], and in the original series, the [[Manga/NeonGenesisEvangelion Manga]] and the [[Anime/RebuildOfEvangelion Rebuild films]], have romantic tensions. However, Rei [[spoiler:is a clone hybrid with elements of Yui's DNA mixed with Lilith's. Debate ensues on if this counts as incest, but for some it does and they like it for exactly that reason.]]
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* One of the most popular ships in ''Anime/NeonGenesisEvangelion'' is Shinji and Rei, since Rei is a the [[FirstGirlWins first girl Shinji encounters]], both of them are [[ShrinkingViolet soft spoken and quiet]], and in the original series, the [[Manga/NeonGenesisEvangelion Manga]] and the [[Anime/RebuildOfEvangelion Rebuild films]], have romantic tensions. However, Rei [[spoiler:is a clone hybrid with elements of Yui's DNA mixed with Lilith's. Debate ensues on if this counts as incest, incest (and if so, whether it's [half-]BrotherSisterIncest or ParentalIncest), but for some some, it does does, and they like it for exactly that reason.]]reason]].
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* The second most popular ship in ''Anime/NeonGenesisEvangelion'' is Shinji and Rei, since Rei is a the [[FirstGirlWins first girl Shinji encounters]], both of them are [[ShrinkingViolet soft spoken and quiet]], and in both the [[Manga/NeonGenesisEvangelion Manga]] and the [[Anime/RebuildOfEvangelion Rebuild films]], have romantic tensions. However, the problem comes in the form of the fact that Rei [[spoiler:is, in the Anime, a clone of Yui, or in the Rebuilds, has elements of Yui's DNA mixed with Lilith's, making him either fall in love with his mother or sister depending on the version.]]
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* The second One of the most popular ship ships in ''Anime/NeonGenesisEvangelion'' is Shinji and Rei, since Rei is a the [[FirstGirlWins first girl Shinji encounters]], both of them are [[ShrinkingViolet soft spoken and quiet]], and in both the original series, the [[Manga/NeonGenesisEvangelion Manga]] and the [[Anime/RebuildOfEvangelion Rebuild films]], have romantic tensions. However, the problem comes in the form of the fact that Rei [[spoiler:is, in the Anime, [[spoiler:is a clone of Yui, or in the Rebuilds, has hybrid with elements of Yui's DNA mixed with Lilith's, making him either fall in love with his mother or sister depending Lilith's. Debate ensues on the version.if this counts as incest, but for some it does and they like it for exactly that reason.]]
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renamed to Clone Angst
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* The second most popular ship in ''Anime/NeonGenesisEvangelion'' is Shinji and Rei, since Rei is a the [[FirstGirlWins first girl Shinji encounters]], both of them are [[ShrinkingViolet soft spoken and quiet]], and in both the [[Manga/NeonGenesisEvangelion Manga]] and the [[Anime/RebuildOfEvangelion Rebuild films]], have romantic tensions. However, the problem comes in the form of the fact that Rei [[spoiler:is, in the Anime, a [[CloningBlues clone of Yui]], or in the Rebuilds, has elements of Yui's DNA mixed with Lilith's, making him either fall in love with his mother or sister depending on the version.]]
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* The second most popular ship in ''Anime/NeonGenesisEvangelion'' is Shinji and Rei, since Rei is a the [[FirstGirlWins first girl Shinji encounters]], both of them are [[ShrinkingViolet soft spoken and quiet]], and in both the [[Manga/NeonGenesisEvangelion Manga]] and the [[Anime/RebuildOfEvangelion Rebuild films]], have romantic tensions. However, the problem comes in the form of the fact that Rei [[spoiler:is, in the Anime, a [[CloningBlues clone of Yui]], Yui, or in the Rebuilds, has elements of Yui's DNA mixed with Lilith's, making him either fall in love with his mother or sister depending on the version.]]
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* The three most popular pairings for Gou from ''Anime/{{Free}}'' appear to be her and Makoto, her and Haru, and her with her brother Rin. It doesn't help that Gou ''does'' admire his muscles in one scene similarly to how she gawks at other boys. Meanwhile, [[https://free-anime.fandom.com/wiki/Ore_no_Im%C5%8Dto_ga_Dokozo_no_Otoko_to_D%C4%93to_Nante_Suru_Wakeganai Rin has a whole Drama CD episode dedicated to the idea that he can't stand the idea of his sister dating anybody,]] its name being a parody of ''LightNovel/{{Oreimo}}'''s, to boot.
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* The three most popular pairings for Gou from ''Anime/{{Free}}'' appear to be her and Makoto, her and Haru, and her with her brother Rin. It doesn't help that Gou ''does'' admire his muscles in one scene similarly to how she gawks at other boys. Meanwhile, [[https://free-anime.fandom.com/wiki/Ore_no_Im%C5%8Dto_ga_Dokozo_no_Otoko_to_D%C4%93to_Nante_Suru_Wakeganai Rin has a whole Drama CD episode dedicated to the idea that he can't stand the idea of his sister dating anybody,]] its name being a parody of ''LightNovel/{{Oreimo}}'''s, ''Literature/{{Oreimo}}'''s, to boot.
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* ''LightNovel/{{Oreimo}}'' is built on this, with a fanbase largely formed of people who want to see Kousuke and Kirino together. [[spoiler:However, when they actually got into a relationship in the end, even most of the shippers found themselves disappointed with how it happened.]]
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* ''LightNovel/{{Oreimo}}'' ''Literature/{{Oreimo}}'' is built on this, with a fanbase largely formed of people who want to see Kousuke and Kirino together. [[spoiler:However, when they actually got into a relationship in the end, even most of the shippers found themselves disappointed with how it happened.]]
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* ''LightNovel/ReZero'''s twin-sisters Ram and Rem have a huge shipping following, due to being a very obvious example of a PseudoRomanticFriendship, especially in official art; so much so that they have become the fan artists' FanPreferredCouple over Rem/Subaru (though some take a third option and just [[OneTrueThreesome pair them all together]] after Subaru starts having tension with Ram as well).
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* ''LightNovel/ReZero'''s ''Literature/ReZero'''s twin-sisters Ram and Rem have a huge shipping following, due to being a very obvious example of a PseudoRomanticFriendship, especially in official art; so much so that they have become the fan artists' FanPreferredCouple over Rem/Subaru (though some take a third option and just [[OneTrueThreesome pair them all together]] after Subaru starts having tension with Ram as well).
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IncestYayShipping in AnimeAndManga.
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* ''Manga/AngelSanctuary'' could not be more blatant about Setsuna and Sara, but some see this between Rociel and Alexiel as well.
* ''Anime/BangDream'' has the twin Hikawa sisters, Sayo and Hina. [[WeUsedToBeFriends They were close as children, but Sayo's increasing envy of Hina's talent drove a wedge between them]]. Over time, Sayo starts to get over her jealousy and mend her relationship with Hina, who never stopped loving her unconditionally, which has been used as a basis to write them as having an incestuous relationship.
* ''Manga/{{Beastars}}'': Being the LauncherOfAThousandShips, Legosi naturally gets this treatment quite a bit. Most infamously with his grandfather Gosha, but shipping Legosi with his mother Leano isn't unheard of either.
* Ichigo/[[spoiler:Uryuu]] is a relatively common ''Manga/{{Bleach}}'' {{Yaoi|Genre}} pairing. Later chapters of the manga revealed that [[spoiler:Uryuu's father and Ichigo's mother were first cousins, making the boys second cousins]], so this is also a case of SurpriseIncest. The revelations have not much-dampened enthusiasm for the ship. [[spoiler:Ryuuken and Masaki had a failed ArrangedMarriage in canon, so clearly the cousin thing isn't an insurmountable barrier. While very much a minority pairing as it contradicts canon 'ships, there's also some fandom for Ryuuken/Masaki as well.]]
* ''Manga/BunnyDrop'' has a step-sibling example. Many fans like the idea of six-year olds Kouki and Rin pairing up eventually, but most of these shippers [[ShipMates also ship]] their guardians/parents Daikichi/Yukari. If Daikichi and Yukari ended up together then Kouki and Rin would end up step-siblings. In the manga itself, [[spoiler:trying to avoid this issue is one of the reasons Daikichi and Yukari never got together]], though the anime and film adaptations opt for MaybeEverAfter.
* ''Anime/CodeGeass'': There's enough of subtext in the series that it has its own IncestSubtext page, naturally leading to this. Lelouch/Nunnally, Lelouch/Euphemia (which is actually canon on Lelouch's side), and Cornelia/Euphemia are three of the most prominent examples; the rest can be found on [[IncestSubtext/CodeGeass that page]].
* ''Manga/DGrayMan'' has Komui and Lenalee Lee. Komui's rather intense sister complex does nothing to disprove this.
* You'd be surprised at just how much of this there is in the ''Anime/DigimonAdventure'' fandom. Out of all the pairings between the characters, the ones between Tai/Kari and Matt/T.K. are among some of the more popular ones (aside from the HoYay that goes on within the fandom) for fans to focus their ShippingGoggles on.
* The anime for ''Manga/DotHackLegendOfTheTwilight'' was notorious for this to the point that it's what a lot of non-fans of the series in general tend to remember about it. The manga it was based on, on the other hand, was vague about it at best.
* From ''Anime/DragonBallZ'', there are some people who ship opposite-sex twins Androids 17 and 18 together. Also, there are the pairings of "Son-cest" (various incestuous pairings within Goku's family) and Vegeta/Trunks or Vegeta/Future Trunks. There's not a lot of it but Vegeta/Bra exists too.
* Agon and Unsui of ''Manga/Eyeshield21'' is THE incest pairing of the fandom. It's not all that hard to see why, because Agon is (without a doubt) the most important person in Unsui's life, while Agon himself is a sociopathic playboy and {{memetic molester}} whose feelings for his brother are left ambiguous.
* The three most popular pairings for Gou from ''Anime/{{Free}}'' appear to be her and Makoto, her and Haru, and her with her brother Rin. It doesn't help that Gou ''does'' admire his muscles in one scene similarly to how she gawks at other boys. Meanwhile, [[https://free-anime.fandom.com/wiki/Ore_no_Im%C5%8Dto_ga_Dokozo_no_Otoko_to_D%C4%93to_Nante_Suru_Wakeganai Rin has a whole Drama CD episode dedicated to the idea that he can't stand the idea of his sister dating anybody,]] its name being a parody of ''LightNovel/{{Oreimo}}'''s, to boot.
* ''Manga/FullmetalAlchemist'':
** Brothers Edward and Alphonse are one of the most popular shipping targets in the fandom, with ''Anime/FullmetalAlchemist2003'' infamous for showing how close the brothers really are. A common saying amongst fans of the relationship is that "they broke so many taboos already, what's one more?"
** A case of SurpriseIncest happened in the 2003 anime. [[spoiler:Edward]] and [[spoiler:Envy]] are a popular pair; however, near the tail end of the series, there's a twist: [[spoiler:Envy is Ed's half-brother]]. Instead of abandoning ship, a lot of fans only saw this as making the pairing more interesting.
** Shipping the Homunculi with each other in the manga/Brotherhood falls under this as they come from the same [[TrulySingleParent "father"]] and consider each other siblings. Greed/Envy has a decent following.
** Shipping Scar with his deceased unnamed brother is not unheard of; especially with the first anime adding many comparisons and contrasts between them and the Elric brothers, though they were both shown to love a woman.
* [[BrotherSisterIncest The Nishizumi sisters]], [[TheHero Miho]] and [[ByronicHero Maho]] from ''Anime/GirlsUndPanzer'' are a surprisingly popular pairing among the fandom, since there are no male characters who are the girls' ages, and relatively little LesYay. This is only reinforced by the revelation in ''Little Army'' that Maho [[spoiler:in contrast to her initial impression as an AloofBigSister, loves Miho enough to live up to being Nishizumi heiress so that Miho will not have to]].
* ''Webcomic/HetaliaAxisPowers'': The very ship-happy fandom naturally has much of this, possibly influenced by Belarus' [[{{yandere}} behaviour toward her brother Russia]] being canon and Prussia acting borderline-flirty around his brother Germany (though Prussia [[MemeticMolester tends to flirt with almost everyone he encounters]]). Aside from the ''many'' cases of NotBloodSiblings being shipped, there are couples like:
** Norway and Iceland; shipping ''increased'' somewhat after their familial connection was revealed, because it attracted shippers who liked the "forbidden" appeal.
** Veneziano Italy and Romano Italy; since they represent different halves of Italy, they are technically half-brothers. The pairing is typically called Itacest, following along the lines of Germancest for Prussia and germany (or possibly predating the term).
** Many fanfics featuring England's brothers (namely Scotland, Ireland, Wales and sometimes Northern Ireland) really love to play up the sibling rivalry setup for all it's worth.
** On the other hand, certain fans who dislike the [=US/UK=] pairing but don't want to go the RonTheDeathEater route like to invert this trope by taking a third option; namely, ignoring the duo's BelligerentSexualTension stunts and/or interpreting their other banter in the series as an example of platonic affection between siblings or a father-son relationship.
* ''Manga/HunterXHunter'': Some fans ship Killia and Alluka on the rare occasion the former isn't shipped with [[BestFriend Gon]]. It's easy to see why since Killua is shown to be an [[BigBrotherInstinct extremely affectionate and protective brother]] with her, even more so than [[{{Tsundere}} his interactions]] with Gon, and Alluka [[BigBrotherWorship admires him]] since he's the only one who [[TheUnfavorite pretty much gives a damn about her.]]
* ''Manga/JoJosBizarreAdventure'': Although shipping the [=JoJos=] with each other is usually not popular because they have [[FanPreferredCouple their own JoBros]] for each series, many in the Japanese fandom took a liking to shipping [[Manga/JojosBizarreAdventureStardustCrusaders Jotaro]]/[[Manga/JoJosBizarreAdventureDiamondIsUnbreakable Josuke]]. This is probably because in canon, Jotaro acts like a BigBrotherMentor to Josuke (despite [[ItMakesSenseInContext being his nephew]]) and Josuke always seems eager to listen to Jotaro.
** Another popular ship inside of the Joestar family tree, even though it boils down to being a CrackPairing, is [[Manga/JojosBizarreAdventureStoneOcean Jolyne]]/[[Manga/JoJosBizarreAdventureGoldenWind Giorno]]. The most likely reason could be that they're the offspring of popular characters and mortal enemies Jotaro and DIO, and by the time that Jolyne reaches 19, Giorno is no longer 15. It also helps that, even though they're on the same family tree, their lineage is ''heavily'' separated, with Giorno being Jolyne's great-great-great-uncle.
*** Even Creator/HirohikoAraki himself seems a tad [[ShipperOnDeck on board with the idea]], as quite a few art pieces of his during the ''[[Manga/JojosBizarreAdventureJoJolion [=JoJolion=]]]''-era features [[https://comicvine1.cbsistatic.com/uploads/original/11130/111307227/7150944-3208046504-Drl-3.jpg Jolyne]] and [[https://s-media-cache-ak0.pinimg.com/736x/5b/07/c8/5b07c854c55b0275a5ce7968757d2679.jpg Giorno]] getting rather... ''[[CuddleBug touchy-feely]]'' with each other.
* ''Anime/KillLaKill'' has [[spoiler:Ryuko/Satsuki]]. They were already a pretty popular ship because they're so dead-set on defeating each other, but after they were revealed to [[spoiler:be sisters]], interest in it skyrocketed. To add even more fuel to the fire, the ending has the two [[spoiler:[[ItMakesSenseInContext embracing while naked]]]].
* Kido, Seto, and Kano from ''Anime/MekakucityActors'' are NotBloodSiblings but make it clear that [[HappilyAdopted they consider each other as siblings]]. It doesn't stop fans from shipping them.
* ''Manga/{{Naruto}}'':
** The number of Itachi/Sasuke fans would surprise newbies, and the size of the fandom only seemed to ''increase'' when [[spoiler:Itachi died and Sasuke learned that Itachi had done everything -- including killing the rest of his family -- for Sasuke's sake]].
** [[KissingCousins Neji/Hinata]] is the second most popular incest pairing, though it bears mention that Japan has less of a taboo regarding relationships between cousins than Western nations do.
** Naruto and [[spoiler:Karin]] were a crack-ship with a few fans for most of the series, but it got a boost in the fandom when it was revealed that [[spoiler:Karin]] is an Uzumaki. Their direct relationship is never clarified; however, fans streamline them into KissingCousins.
** Naruto with both his mother Kushina and his father Minato are also popular incestous pairings, mainly because the parents look so [[AbsurdlyYouthfulParents young and pretty]] they actually look more like Naruto's ''siblings''.
** In {{canon}}, it's never clarified if Hinata's parents or Sasuke's parents were related. Most fans depict them as either distant relatives or outright cousins, due to the StrongFamilyResemblance between them.
** The titular protagonist of ''Manga/{{Boruto}}'' has been shipped with most members of his family, including his father Naruto, mother [[spoiler:Hinata]], sister Himawari, and aunt [[spoiler:Hanabi]].
* The second most popular ship in ''Anime/NeonGenesisEvangelion'' is Shinji and Rei, since Rei is a the [[FirstGirlWins first girl Shinji encounters]], both of them are [[ShrinkingViolet soft spoken and quiet]], and in both the [[Manga/NeonGenesisEvangelion Manga]] and the [[Anime/RebuildOfEvangelion Rebuild films]], have romantic tensions. However, the problem comes in the form of the fact that Rei [[spoiler:is, in the Anime, a [[CloningBlues clone of Yui]], or in the Rebuilds, has elements of Yui's DNA mixed with Lilith's, making him either fall in love with his mother or sister depending on the version.]]
* The most popular ''Manga/NoMatterHowILookAtItItsYouGuysFaultImNotPopular'' ship is Tomoko and her brother Tomoki. possibly due to the small cast. And/or that Tomoki used to adore his sister years ago but is now embarrassed by the fact he wanted to marry her as a little kid.
* ''Manga/OnePiece'':
** The brothers Ace and Luffy are a fairly popular pairing in the fandom. And since the flashbacks to their childhood there is also now [[spoiler:Sabo]]/Luffy, Ace/[[spoiler:Sabo]], and [[spoiler:Sabo]]/Luffy/Ace OneTrueThreesome shipping. In a looser definition, Ace is also often shipped with his crew mate Marco, who is as much of a brother to him as Luffy is.
** As of the Whole Cake Island Arc, Sanji was revealed to [[spoiler:have three brothers and an older sister.]] Shipping abounds.
* ''LightNovel/{{Oreimo}}'' is built on this, with a fanbase largely formed of people who want to see Kousuke and Kirino together. [[spoiler:However, when they actually got into a relationship in the end, even most of the shippers found themselves disappointed with how it happened.]]
* Most of ''Anime/OsomatsuSan'' shipping consists of pairing any number of Matsuno sextuplets together. Creator/TakahiroSakurai even poked fun at it during the first seyuu event for the show, guessing that his character had a "pine" fetish (i.e. his brothers), with [[{{Squick}} predictable results from his co-stars]].
* Hikaru and Kaoru Hitatchiin from ''Manga/OuranHighSchoolHostClub'' make this easy, deliberately playing up the {{Twincest}} angle for the benefit of their fans. Their actual relationship is left ambiguous, but real life fans love it as much as the fictional ones.
* ''Manga/PandoraHearts'': Gil's younger brother, Vincent, is [[{{Yandere}} extremely possessive]] of him.
* ''Anime/PantyAndStockingWithGarterbelt'' has plenty of fans that ship the title sisters together. Their evil counterparts, Scanty and Kneesocks, also have this going, though in their case it's also canon.
* In ''Manga/PeacemakerKurogane'', Tatsunosuke's overprotectiveness over his younger brother Tetsunosuke sometimes causes this.
* ''[[Anime/PokemonTheSeries Pokémon: Ruby & Sapphire]]'': May and Max (Petalburgshipping) were popular enough to have an article written about potential hints on Bulbapedia, though it and most of the Anime shipping pages were removed in 2020 following a massive restructuring of the site.
* ''Anime/QueensBlade'': The ''"Hide & Seek"'' manga adaptation features a romantic subplot about [[TomboyPrincess Elina]] and [[LadyOfWar Claudette's]] hidden feelings for each other, because they're half-sisters. But during chapter 28, their middle sister Leina reveals she's known about it and says [[ShipperOnDeck she's okay with it.]]
* ''LightNovel/ReZero'''s twin-sisters Ram and Rem have a huge shipping following, due to being a very obvious example of a PseudoRomanticFriendship, especially in official art; so much so that they have become the fan artists' FanPreferredCouple over Rem/Subaru (though some take a third option and just [[OneTrueThreesome pair them all together]] after Subaru starts having tension with Ram as well).
* ''Manga/{{Saki}}'' and Teru Miyanaga sometimes get paired despite canonically not being on good terms, as Teru is unwilling to speak with Saki. Some shippers take Teru's [[IHaveNoSon denying having a sister]] to mean that Teru is ''in love with'' Saki.
* ''Manga/SgtFrog'' has Giroro and his elder brother Garuru which is the most popular Giroro-oriented ship aside from Gironatsu and Girokuru for the Japanese fandom especially. This is most likely due to the lengths Garuru goes to ensure Giroro remains on his mission as well as Giroro's admiration for him/frantic, embarrassed reactions when he's near. The Hinata family is shipped together sometimes as well.
* ''Manga/SketDance'': Bossun/[[spoiler:Tsubaki]] is rather well-known inside the fandom after TheReveal that they are twins.
* ''Anime/TengenToppaGurrenLagann'' fandom has not insignificant sect of Simon/Kamina shippers, who call each other their brother. While it's a little ambiguous whether the characters actually are related, they're certainly close enough that it probably doesn't matter.
* In ''Manga/Touch1981'', Yuka Nitta is, at least at first, very protective of her older brother and a bit too concerned at the prospect of him having a love life.
* Mikan and Rito from ''Manga/ToLoveRu'' are a fairly popular pairing; it even has in-universe support from Momo, who would include Mikan in The Harem Plan.
* [[{{Unicorn}} Unico and Corn]] from the Creator/OsamuTezuka [[Manga/{{Unico}} manga of the same name]] is a popular ship with fans of Tezuka's works. This is due to Corn (Unico's sister) having a very close relationship with her brother after he reunites with his family and siblings in the manga. Japanese fanart and official merchandise by Tezuka Productions frequently [[https://prtimes.jp/i/1117/186/resize/d1117-186-133847-9.jpg depict her flirting with Unico.]]
* In ''Manga/VampireKnight'', the [[spoiler:Kuran]] family has a history of incest, as seen in the current generation between [[spoiler:Kaname and Yuuki.]] They remain a popular ship in the fandom, along with Zero and Ichiru.
* There is a sizeable number of named and shipped pairs of this variety across the ''Anime/YuGiOh'' franchise.
** Duel Monsters has Seto/Mokuba, for example, in that Seto would do anything in the early series for his younger brother.
** From the spin-offs, gregarious examples such as the {{Twincest}} between Rio and Shark from ''[[Anime/YuGiOhZEXAL ZEXAL]]'' in that they have rings gifted to each other, and later on in ''[[Anime/YuGiOhVRAINS VRAINS]]'', Ema and Kengo were mistaken for exes by many fans when in reality [[spoiler: they were half-siblings related by their father and Kengo's disdain for his father's abandonment of he and his mother was causing strife.]]
IncestYayShipping in AnimeAndManga.
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* ''Manga/AngelSanctuary'' could not be more blatant about Setsuna and Sara, but some see this between Rociel and Alexiel as well.
* ''Anime/BangDream'' has the twin Hikawa sisters, Sayo and Hina. [[WeUsedToBeFriends They were close as children, but Sayo's increasing envy of Hina's talent drove a wedge between them]]. Over time, Sayo starts to get over her jealousy and mend her relationship with Hina, who never stopped loving her unconditionally, which has been used as a basis to write them as having an incestuous relationship.
* ''Manga/{{Beastars}}'': Being the LauncherOfAThousandShips, Legosi naturally gets this treatment quite a bit. Most infamously with his grandfather Gosha, but shipping Legosi with his mother Leano isn't unheard of either.
* Ichigo/[[spoiler:Uryuu]] is a relatively common ''Manga/{{Bleach}}'' {{Yaoi|Genre}} pairing. Later chapters of the manga revealed that [[spoiler:Uryuu's father and Ichigo's mother were first cousins, making the boys second cousins]], so this is also a case of SurpriseIncest. The revelations have not much-dampened enthusiasm for the ship. [[spoiler:Ryuuken and Masaki had a failed ArrangedMarriage in canon, so clearly the cousin thing isn't an insurmountable barrier. While very much a minority pairing as it contradicts canon 'ships, there's also some fandom for Ryuuken/Masaki as well.]]
* ''Manga/BunnyDrop'' has a step-sibling example. Many fans like the idea of six-year olds Kouki and Rin pairing up eventually, but most of these shippers [[ShipMates also ship]] their guardians/parents Daikichi/Yukari. If Daikichi and Yukari ended up together then Kouki and Rin would end up step-siblings. In the manga itself, [[spoiler:trying to avoid this issue is one of the reasons Daikichi and Yukari never got together]], though the anime and film adaptations opt for MaybeEverAfter.
* ''Anime/CodeGeass'': There's enough of subtext in the series that it has its own IncestSubtext page, naturally leading to this. Lelouch/Nunnally, Lelouch/Euphemia (which is actually canon on Lelouch's side), and Cornelia/Euphemia are three of the most prominent examples; the rest can be found on [[IncestSubtext/CodeGeass that page]].
* ''Manga/DGrayMan'' has Komui and Lenalee Lee. Komui's rather intense sister complex does nothing to disprove this.
* You'd be surprised at just how much of this there is in the ''Anime/DigimonAdventure'' fandom. Out of all the pairings between the characters, the ones between Tai/Kari and Matt/T.K. are among some of the more popular ones (aside from the HoYay that goes on within the fandom) for fans to focus their ShippingGoggles on.
* The anime for ''Manga/DotHackLegendOfTheTwilight'' was notorious for this to the point that it's what a lot of non-fans of the series in general tend to remember about it. The manga it was based on, on the other hand, was vague about it at best.
* From ''Anime/DragonBallZ'', there are some people who ship opposite-sex twins Androids 17 and 18 together. Also, there are the pairings of "Son-cest" (various incestuous pairings within Goku's family) and Vegeta/Trunks or Vegeta/Future Trunks. There's not a lot of it but Vegeta/Bra exists too.
* Agon and Unsui of ''Manga/Eyeshield21'' is THE incest pairing of the fandom. It's not all that hard to see why, because Agon is (without a doubt) the most important person in Unsui's life, while Agon himself is a sociopathic playboy and {{memetic molester}} whose feelings for his brother are left ambiguous.
* The three most popular pairings for Gou from ''Anime/{{Free}}'' appear to be her and Makoto, her and Haru, and her with her brother Rin. It doesn't help that Gou ''does'' admire his muscles in one scene similarly to how she gawks at other boys. Meanwhile, [[https://free-anime.fandom.com/wiki/Ore_no_Im%C5%8Dto_ga_Dokozo_no_Otoko_to_D%C4%93to_Nante_Suru_Wakeganai Rin has a whole Drama CD episode dedicated to the idea that he can't stand the idea of his sister dating anybody,]] its name being a parody of ''LightNovel/{{Oreimo}}'''s, to boot.
* ''Manga/FullmetalAlchemist'':
** Brothers Edward and Alphonse are one of the most popular shipping targets in the fandom, with ''Anime/FullmetalAlchemist2003'' infamous for showing how close the brothers really are. A common saying amongst fans of the relationship is that "they broke so many taboos already, what's one more?"
** A case of SurpriseIncest happened in the 2003 anime. [[spoiler:Edward]] and [[spoiler:Envy]] are a popular pair; however, near the tail end of the series, there's a twist: [[spoiler:Envy is Ed's half-brother]]. Instead of abandoning ship, a lot of fans only saw this as making the pairing more interesting.
** Shipping the Homunculi with each other in the manga/Brotherhood falls under this as they come from the same [[TrulySingleParent "father"]] and consider each other siblings. Greed/Envy has a decent following.
** Shipping Scar with his deceased unnamed brother is not unheard of; especially with the first anime adding many comparisons and contrasts between them and the Elric brothers, though they were both shown to love a woman.
* [[BrotherSisterIncest The Nishizumi sisters]], [[TheHero Miho]] and [[ByronicHero Maho]] from ''Anime/GirlsUndPanzer'' are a surprisingly popular pairing among the fandom, since there are no male characters who are the girls' ages, and relatively little LesYay. This is only reinforced by the revelation in ''Little Army'' that Maho [[spoiler:in contrast to her initial impression as an AloofBigSister, loves Miho enough to live up to being Nishizumi heiress so that Miho will not have to]].
* ''Webcomic/HetaliaAxisPowers'': The very ship-happy fandom naturally has much of this, possibly influenced by Belarus' [[{{yandere}} behaviour toward her brother Russia]] being canon and Prussia acting borderline-flirty around his brother Germany (though Prussia [[MemeticMolester tends to flirt with almost everyone he encounters]]). Aside from the ''many'' cases of NotBloodSiblings being shipped, there are couples like:
** Norway and Iceland; shipping ''increased'' somewhat after their familial connection was revealed, because it attracted shippers who liked the "forbidden" appeal.
** Veneziano Italy and Romano Italy; since they represent different halves of Italy, they are technically half-brothers. The pairing is typically called Itacest, following along the lines of Germancest for Prussia and germany (or possibly predating the term).
** Many fanfics featuring England's brothers (namely Scotland, Ireland, Wales and sometimes Northern Ireland) really love to play up the sibling rivalry setup for all it's worth.
** On the other hand, certain fans who dislike the [=US/UK=] pairing but don't want to go the RonTheDeathEater route like to invert this trope by taking a third option; namely, ignoring the duo's BelligerentSexualTension stunts and/or interpreting their other banter in the series as an example of platonic affection between siblings or a father-son relationship.
* ''Manga/HunterXHunter'': Some fans ship Killia and Alluka on the rare occasion the former isn't shipped with [[BestFriend Gon]]. It's easy to see why since Killua is shown to be an [[BigBrotherInstinct extremely affectionate and protective brother]] with her, even more so than [[{{Tsundere}} his interactions]] with Gon, and Alluka [[BigBrotherWorship admires him]] since he's the only one who [[TheUnfavorite pretty much gives a damn about her.]]
* ''Manga/JoJosBizarreAdventure'': Although shipping the [=JoJos=] with each other is usually not popular because they have [[FanPreferredCouple their own JoBros]] for each series, many in the Japanese fandom took a liking to shipping [[Manga/JojosBizarreAdventureStardustCrusaders Jotaro]]/[[Manga/JoJosBizarreAdventureDiamondIsUnbreakable Josuke]]. This is probably because in canon, Jotaro acts like a BigBrotherMentor to Josuke (despite [[ItMakesSenseInContext being his nephew]]) and Josuke always seems eager to listen to Jotaro.
** Another popular ship inside of the Joestar family tree, even though it boils down to being a CrackPairing, is [[Manga/JojosBizarreAdventureStoneOcean Jolyne]]/[[Manga/JoJosBizarreAdventureGoldenWind Giorno]]. The most likely reason could be that they're the offspring of popular characters and mortal enemies Jotaro and DIO, and by the time that Jolyne reaches 19, Giorno is no longer 15. It also helps that, even though they're on the same family tree, their lineage is ''heavily'' separated, with Giorno being Jolyne's great-great-great-uncle.
*** Even Creator/HirohikoAraki himself seems a tad [[ShipperOnDeck on board with the idea]], as quite a few art pieces of his during the ''[[Manga/JojosBizarreAdventureJoJolion [=JoJolion=]]]''-era features [[https://comicvine1.cbsistatic.com/uploads/original/11130/111307227/7150944-3208046504-Drl-3.jpg Jolyne]] and [[https://s-media-cache-ak0.pinimg.com/736x/5b/07/c8/5b07c854c55b0275a5ce7968757d2679.jpg Giorno]] getting rather... ''[[CuddleBug touchy-feely]]'' with each other.
* ''Anime/KillLaKill'' has [[spoiler:Ryuko/Satsuki]]. They were already a pretty popular ship because they're so dead-set on defeating each other, but after they were revealed to [[spoiler:be sisters]], interest in it skyrocketed. To add even more fuel to the fire, the ending has the two [[spoiler:[[ItMakesSenseInContext embracing while naked]]]].
* Kido, Seto, and Kano from ''Anime/MekakucityActors'' are NotBloodSiblings but make it clear that [[HappilyAdopted they consider each other as siblings]]. It doesn't stop fans from shipping them.
* ''Manga/{{Naruto}}'':
** The number of Itachi/Sasuke fans would surprise newbies, and the size of the fandom only seemed to ''increase'' when [[spoiler:Itachi died and Sasuke learned that Itachi had done everything -- including killing the rest of his family -- for Sasuke's sake]].
** [[KissingCousins Neji/Hinata]] is the second most popular incest pairing, though it bears mention that Japan has less of a taboo regarding relationships between cousins than Western nations do.
** Naruto and [[spoiler:Karin]] were a crack-ship with a few fans for most of the series, but it got a boost in the fandom when it was revealed that [[spoiler:Karin]] is an Uzumaki. Their direct relationship is never clarified; however, fans streamline them into KissingCousins.
** Naruto with both his mother Kushina and his father Minato are also popular incestous pairings, mainly because the parents look so [[AbsurdlyYouthfulParents young and pretty]] they actually look more like Naruto's ''siblings''.
** In {{canon}}, it's never clarified if Hinata's parents or Sasuke's parents were related. Most fans depict them as either distant relatives or outright cousins, due to the StrongFamilyResemblance between them.
** The titular protagonist of ''Manga/{{Boruto}}'' has been shipped with most members of his family, including his father Naruto, mother [[spoiler:Hinata]], sister Himawari, and aunt [[spoiler:Hanabi]].
* The second most popular ship in ''Anime/NeonGenesisEvangelion'' is Shinji and Rei, since Rei is a the [[FirstGirlWins first girl Shinji encounters]], both of them are [[ShrinkingViolet soft spoken and quiet]], and in both the [[Manga/NeonGenesisEvangelion Manga]] and the [[Anime/RebuildOfEvangelion Rebuild films]], have romantic tensions. However, the problem comes in the form of the fact that Rei [[spoiler:is, in the Anime, a [[CloningBlues clone of Yui]], or in the Rebuilds, has elements of Yui's DNA mixed with Lilith's, making him either fall in love with his mother or sister depending on the version.]]
* The most popular ''Manga/NoMatterHowILookAtItItsYouGuysFaultImNotPopular'' ship is Tomoko and her brother Tomoki. possibly due to the small cast. And/or that Tomoki used to adore his sister years ago but is now embarrassed by the fact he wanted to marry her as a little kid.
* ''Manga/OnePiece'':
** The brothers Ace and Luffy are a fairly popular pairing in the fandom. And since the flashbacks to their childhood there is also now [[spoiler:Sabo]]/Luffy, Ace/[[spoiler:Sabo]], and [[spoiler:Sabo]]/Luffy/Ace OneTrueThreesome shipping. In a looser definition, Ace is also often shipped with his crew mate Marco, who is as much of a brother to him as Luffy is.
** As of the Whole Cake Island Arc, Sanji was revealed to [[spoiler:have three brothers and an older sister.]] Shipping abounds.
* ''LightNovel/{{Oreimo}}'' is built on this, with a fanbase largely formed of people who want to see Kousuke and Kirino together. [[spoiler:However, when they actually got into a relationship in the end, even most of the shippers found themselves disappointed with how it happened.]]
* Most of ''Anime/OsomatsuSan'' shipping consists of pairing any number of Matsuno sextuplets together. Creator/TakahiroSakurai even poked fun at it during the first seyuu event for the show, guessing that his character had a "pine" fetish (i.e. his brothers), with [[{{Squick}} predictable results from his co-stars]].
* Hikaru and Kaoru Hitatchiin from ''Manga/OuranHighSchoolHostClub'' make this easy, deliberately playing up the {{Twincest}} angle for the benefit of their fans. Their actual relationship is left ambiguous, but real life fans love it as much as the fictional ones.
* ''Manga/PandoraHearts'': Gil's younger brother, Vincent, is [[{{Yandere}} extremely possessive]] of him.
* ''Anime/PantyAndStockingWithGarterbelt'' has plenty of fans that ship the title sisters together. Their evil counterparts, Scanty and Kneesocks, also have this going, though in their case it's also canon.
* In ''Manga/PeacemakerKurogane'', Tatsunosuke's overprotectiveness over his younger brother Tetsunosuke sometimes causes this.
* ''[[Anime/PokemonTheSeries Pokémon: Ruby & Sapphire]]'': May and Max (Petalburgshipping) were popular enough to have an article written about potential hints on Bulbapedia, though it and most of the Anime shipping pages were removed in 2020 following a massive restructuring of the site.
* ''Anime/QueensBlade'': The ''"Hide & Seek"'' manga adaptation features a romantic subplot about [[TomboyPrincess Elina]] and [[LadyOfWar Claudette's]] hidden feelings for each other, because they're half-sisters. But during chapter 28, their middle sister Leina reveals she's known about it and says [[ShipperOnDeck she's okay with it.]]
* ''LightNovel/ReZero'''s twin-sisters Ram and Rem have a huge shipping following, due to being a very obvious example of a PseudoRomanticFriendship, especially in official art; so much so that they have become the fan artists' FanPreferredCouple over Rem/Subaru (though some take a third option and just [[OneTrueThreesome pair them all together]] after Subaru starts having tension with Ram as well).
* ''Manga/{{Saki}}'' and Teru Miyanaga sometimes get paired despite canonically not being on good terms, as Teru is unwilling to speak with Saki. Some shippers take Teru's [[IHaveNoSon denying having a sister]] to mean that Teru is ''in love with'' Saki.
* ''Manga/SgtFrog'' has Giroro and his elder brother Garuru which is the most popular Giroro-oriented ship aside from Gironatsu and Girokuru for the Japanese fandom especially. This is most likely due to the lengths Garuru goes to ensure Giroro remains on his mission as well as Giroro's admiration for him/frantic, embarrassed reactions when he's near. The Hinata family is shipped together sometimes as well.
* ''Manga/SketDance'': Bossun/[[spoiler:Tsubaki]] is rather well-known inside the fandom after TheReveal that they are twins.
* ''Anime/TengenToppaGurrenLagann'' fandom has not insignificant sect of Simon/Kamina shippers, who call each other their brother. While it's a little ambiguous whether the characters actually are related, they're certainly close enough that it probably doesn't matter.
* In ''Manga/Touch1981'', Yuka Nitta is, at least at first, very protective of her older brother and a bit too concerned at the prospect of him having a love life.
* Mikan and Rito from ''Manga/ToLoveRu'' are a fairly popular pairing; it even has in-universe support from Momo, who would include Mikan in The Harem Plan.
* [[{{Unicorn}} Unico and Corn]] from the Creator/OsamuTezuka [[Manga/{{Unico}} manga of the same name]] is a popular ship with fans of Tezuka's works. This is due to Corn (Unico's sister) having a very close relationship with her brother after he reunites with his family and siblings in the manga. Japanese fanart and official merchandise by Tezuka Productions frequently [[https://prtimes.jp/i/1117/186/resize/d1117-186-133847-9.jpg depict her flirting with Unico.]]
* In ''Manga/VampireKnight'', the [[spoiler:Kuran]] family has a history of incest, as seen in the current generation between [[spoiler:Kaname and Yuuki.]] They remain a popular ship in the fandom, along with Zero and Ichiru.
* There is a sizeable number of named and shipped pairs of this variety across the ''Anime/YuGiOh'' franchise.
** Duel Monsters has Seto/Mokuba, for example, in that Seto would do anything in the early series for his younger brother.
** From the spin-offs, gregarious examples such as the {{Twincest}} between Rio and Shark from ''[[Anime/YuGiOhZEXAL ZEXAL]]'' in that they have rings gifted to each other, and later on in ''[[Anime/YuGiOhVRAINS VRAINS]]'', Ema and Kengo were mistaken for exes by many fans when in reality [[spoiler: they were half-siblings related by their father and Kengo's disdain for his father's abandonment of he and his mother was causing strife.]]
