History Manga / LoveGeneXX

* IncompatibleOrientation: In the ''Love Stage!!'' crossover, a group of Adams begs the cast to come to the future to reintroduce men into their society. They decline since not only are they taken by other men, but none of them see themselves being attracted to anyone in their all-female world. After a hasty retreat to their own time, the Adams wonder if all the men of the past were gay.

In the 21st century, humanity was hit by a virus that affected male chromosomes, causing all babies to be born female. In 2122, the last man on Earth died, and the now all-female world adopted the "Eden Project", under which half of the planet's population would carry out traditional masculine gender roles as "Adams", while the rest would continue to bear children as "Eves". In 2160, an Adam named Aoi Koshiro enrolls at the prestigious Kingdom Academy with an express goal of becoming its top student--a position [[TheRival currently occupied]] by Sakura Kokonoe, a ridiculously attractive and successful Adam from a privileged and rich family. Before long, however, Aoi's rivalry with Sakura gives way to feelings he cannot quite comprehend.

''Love Gene XX'' (a.k.a. ''Love DNA XX'' and ''Renai Idenshi XX'') is a YuriGenre manga that ran in ''Magazine/YuriHime'' between 2009 and 2013. It was written by Eiki Eiki and illustrated by Taishi Zaou--a duo best known for their BoysLove works (and ''Manga/HaruNatsuAkiFuyu'')--and is, as a result, a rather unique blend of yuri and yaoi tropes that profoundly challenges the concept of traditional gender roles in a patriarchal society.

* TheChessmaster: [[spoiler:Matsuri Nanaho turns out to be a master manipulator who did his best to keep Aoi and Sakura from getting into trouble--because his boss and lover Sumire Kokonoe needs both of them for his plans to transform society.]]

* KissOfLife: After Aoi seemingly drowns, Sakura panics and attempts to give him CPR--it turns out, he was just momentarily unconscious, and this was their respective FirstKiss. Lampshaded in that they comment "But...does CPR even count...?"

* MustMakeAmends: After Sakura breaks Aoi's practice sword, he tries fixing it the best he can--which is not very well, as the only skill he seems ''not'' to be good at is woodwork. Still, his clumsy (and self-harming) attempt to make amends makes Aoi forgive him on the spot, and the whole incident serves as the main catalyst of them falling in love.

* TheStoic: Mizuki keeps a cool head at all times, regardless of the situation. That said, he is capable of strong emotions--he just never lets them influence his actions.
* ThoseTwoGirls: Renge Ooyama and Maki Abe serve as Erika's "bodyguards" and spies--that's pretty much their entire role.

* {{Meganekko}}: Aoi even affectionately refers to Momiji as "Four Eyes".

* YouGottaHaveBlueHair: Aoi and Sakura are the most obvious examples (having blue and pink hair respectively), but a colour spread shows Mizuki as having violet hair, and Matsuri's hair being a bright orange and red.

* FantasyCounterpartCulture: The costumes in this manga follow a distinctly Versailles fashion (despite being set in the future) -- partly as a nod to a [[Manga/TheRoseOfVersailles certain other manga about a crossdressing swordswoman]], partly foreshadowing TheReveal that [[spoiler:there is a social revolution in the brewing]].

* GenderFlip: The bonus chapter ''Love Gene XY'' reimagines the series as a BoysLove story with an all-male cast. Rather than different genders, the boys instead are segregated into "Over Here" (rough-faced/{{Seme}}) and "Over There" (fair-faced/{{Uke}}) roles. Aoi is portrayed as an "Over There" who transfers to the opposite school, and gets sexually harassed until Sakura comes to save him.

* ArtisticLicenseMedicine: Although society wants Adams to look masculine, they only ever dress like men and bind their breasts, never undergoing gender-confirmation surgery or hormone replacement. In universe, this could be hedging their bets for the fraction of Adams that are made Eves for loving other Adams. From a narrative perspective, it serves to emphasize the division between genders as completely arbitrary. More cynically, the series ran in a yuri magazine, it's a questionable if readers would have accepted a manga where the protagonists were biologically masculine.

* TheAce: Sakura Kokonoe is good at pretty much everything without even exerting
himself, much to Aoi's irritation. He would be completely unbearable if it weren't for his honesty and occasional clumsiness.

* TheAce: Sakura Kokonoe is good at pretty much everything without even exerting himself, much to Aoi's irritation. He would be completely unbearable if it weren't for his honesty and occasional clumsiness.

* AmbiguousGenderIdentity: The concept of Adams makes traditional gender identity rather hard to apply, especially concerning Aoi and Sakura. Are they a lesbian couple who are simply forced into a masculine gender role? Or are they transgender gay men, who would stay as they are if they could? The fans are stumped, although the ending [[spoiler: indicates that, without the Adam/Eve system in place, it would be a moot point anyway]].

* CrossOver: ''Manga/LoveStage'' by the same authors featured a joke WhatIf chapter where its cast encounters the characters from this manga.

* NonHeteronormativeSociety: Played with; [[{{Gendercide}} all remaining humans are biologically female]], so all couples are same-sex. However, society is trying as hard as it can to ''closely replicate'' binary-gender and heteronormative (if not outright patriarchal) values by segregating females into masculine (Adam) and feminine (Eve) genders, only allowing [[MasculineFeminineGayCouple coupling between the two]]. Oddly, they're not ''entirely'' cisnormative, as people are allowed to change between being an Adam and Eve without too much hassle.
** The only occasions in which characters appear to change roles, however, is when an Adam (e.g. Erika, Aoi's mother, and [[spoiler:Sakura]]) are peer-pressured or forced to socially transition as Eves, and this is so that their gay relationships can become "straight"; this forcing of a really restrictive "woman" role very much makes it out to be a punishment, which is about as heteronormative (and misogynist!) as you can get. Having said that, Adams essentially being raised as transmasculine means that it's normal and expected for Adams to bind their breasts, and in theory top surgery and testosterone exist and would be available to older Adams.

* RaisedAsTheOppositeGender: The Adams, who are referred to with masculine third-person pronouns, made to bind their breasts, and are given a more traditionally masculine gender role. This is due to the presumption being that men (or, in this case, stand-ins for men) are needed for society to function. [[spoiler: The ending has characters seriously contest that idea, with a revolution being on the horizon.]]

* NonHeteronormativeSociety: Played with; [[{{Gendercide}} all remaining humans are biologically female]], so all couples are same-sex. However, society is trying as hard as it can to ''closely replicate'' cisnormative and heteronormative (if not outright patriarchal) values by segregating females into masculine (Adam) and feminine (Eve) genders, only allowing [[MasculineFeminineGayCouple coupling between the two]].

* NonHeternormativeSociety: Played with; [[{{Gendercide}} all remaining humans are biologically female]], so all couples are same-sex. However, society is trying as hard as it can to ''closely replicate'' cisnormative and heteronormative (if not outright patriarchal) values by segregating females into masculine (Adam) and feminine (Eve) genders, only allowing [[MasculineFeminineGayCouple coupling between the two]].

* AmbiguousGenderIdentity: All of the Adams, although Aoi and Sakura get this the most. Are they a lesbian couple who are simply forced into a masculine gender role? Or are they transgender gay men, who would stay as they are if they could? The fans are stumped, although the ending [[spoiler: indicates that, without the Adam/Eve system in place, it would be a moot point anyway]].

* GenderBender: It's excessively easy to forget that all characters in this manga are biologically female. This is emphasized in an ImagineSpot where Aoi pictures all the Adam Etoiles as men, which freaks him out.

* PuttingOnTheReich: ...or rather, the Thermidor. The costumes in this manga follow a distinctly Versailles fashion (despite being set in the future) -- partly as a nod to a [[Manga/TheRoseOfVersailles certain other manga about a crossdressing swordswoman]], partly foreshadowing TheReveal that [[spoiler:there is a social revolution in the brewing]].

* StarCrossedLovers: It is strictly forbidden for Adams to be romantically or sexually involved with each other. Interestingly, Eves don't seem to be under any such restrictions (although it could also be that it's forbidden for Eves and [[spoiler: Erika]] just doesn't get caught).

''Love Gene XX'' (a.k.a. ''Love DNA XX'' and ''Renai Idenshi XX'') is a YuriGenre manga that ran in ''Magazine/YuriHime'' between 2009 and 2013. It was written by Eiki Eiki and illustrated by Taishi Zaou--a duo best known for their BoysLove works (and ''Manga/HaruNatsuAkiFuyu'')--and is, as a result, a rather unique [[GenderBender blend of yuri and yaoi tropes]] that profoundly challenges the concept of traditional gender roles in a patriarchal society.

* PuttingOnTheReich: ...or rather, the Thermidor. The costumes in this manga follow a distinctly Versailles fashion (despite being set in the future)--partly as a nod to a [[Manga/RoseOfVersailles certain other manga about a crossdressing swordswoman]], partly foreshadowing TheReveal that [[spoiler:there is a social revolution in the brewing]].

* GenderBender: It's excessively easy to forget that all characters in this manga are biologically female.

* GenderFlip: The bonus chapter ''Love Gene XY'' reimagines the series as a BoysLove story with an all-male cast.

* AmbiguousGenderIdentity: All of the Adams, although Aoi and Sakura get this the most. Are they a lesbian couple who are simply forced into a masculine gender role? Or are they transgender gay men, who would stay as they are if they could? The fans are stumped, although the ending [[spoiler: hints that, without the Adam/Eve system in place, they would be the former]].

* PuttingOnTheReich: The costumes in this manga follow a distinctly Versailles fashion (despite being set in the future)--partly as a nod to a [[Manga/RoseOfVersailles certain other manga about a crossdressing swordswoman]], partly foreshadowing TheReveal that [[spoiler:there is a social revolution in the brewing]].

* [[MenActWomenAre Adams Act, Eves Are]]: To become a top star of the Kingdom, Adams have to score well enough on the tests to count among the top five students of their class. Eve top star membership, meanwhile, is determined by a popularity contest among other Eves.

* [[PuttingOnTheReich Putting on the Thermidor]]: The costumes in this manga follow a distinctly Versailles fashion (despite being set in the future)--partly as a nod to a [[Manga/RoseOfVersailles certain other manga about a crossdressing swordswoman]], partly foreshadowing TheReveal that [[spoiler:there is a social revolution in the brewing]].

* StarCrossedLovers: It is strictly forbidden for Adams to be romantically or sexually engaged with each other. Interestingly, Eves don't seem to be under any such restrictions (although it could also be that it's forbidden for Eves and [[spoiler: Erika]] just doesn't get caught).

* JustFriends: Since both Sakura and Aoi are so incredibly ObliviousToLove, they spend most of the manga calling their relationship simply "best friends".

[[caption-width-right:350:Aoi and Sakura, JustFriends]]

* KissOfLife: After Aoi seemingly drowns, Sakura panics and attempts to give him CPR--it turns out, he was just momentarily unconscious, and this was their respective FirstKiss.

* RaisedAsTheOppositeGender: The Adams, who are referred to with masculine third-person pronouns, made to wear masculine clothes, and are given a more traditionally masculine gender role. The ending notes how incredibly unfair and messed up this is, and [[spoiler: shows that this way of doing things may come to an end.]]
* StarCrossedLovers: It is strictly forbidden for Adams to be romantically or sexually engaged with each other. Interestingly, Eves don't seem to be under any such restrictions.

* AmbiguousGenderIdentity: All of the Adams, although Aoi and Sakura get this the most. Are they a lesbian couple who are simply forced into a masculine gender role? Or are they a gay male couple, who would stay as they are if they could? The fans are stumped, although the ending [[spoiler: hints that, without the Adam/Eve system in place, they would be the former]].

* AmbiguousGenderIdentity: All of the Adams, although Aoi and Sakura get this the most. Are they a lesbian couple who are simply forced into a masculine gender role? Or are they a gay male couple, who would stay as they are if they could?