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6.3TV-MA

SeriesDrama, Animation20121 Season

Is insanity hereditary? Shougo Mikadono's beginning to think so, because the terms of his late father's will seem crazy and following them may drive Shougo bonkers as well. Oh, it sounds simple at first: before Shougo can claim his VERY large inheritance, he just has to start attending a certain new school and find a nice girl to marry. It's a little unromantic, but perfectly do-able, right? After all, all the girls seem quite friendly, so all Shougo has to do is find one he has something in common with. Except, and here's the kicker, it turns out that Shougo has WAY too much in common with one of them, because she's actually his long-lost sister! And he has no idea which one she is! Will Shougo meet and court his Miss Right without committing something very morally wrong? Can he find his future bride without slipping into the wrong set of genes? And if his little sister does reveal herself, just how much will be revealed and under what circumstances?

Episodes

Season 1

1The Voice of My Unfamiliar Little SisterJul 6, 2012 · 25m · ★ 9.0During his father’s funeral, Shogo hears a voice outside his window claiming to be his little sister, before he has a chance to learn more, he is told the conditions of his inheritance.
2My Sister and the Moonlit DanceJul 13, 2012 · 25m · ★ 9.0After the mysterious phone call the person claiming to be his sister, Shogo school life gets more hectic with the arrival of a new transfer student.
3My Sister's SeductionJul 20, 2012 · 25m · ★ 9.0The question of Shogo's sexual preference is causing Miyabi and Rinka to go overboard on showing the appeals of a woman.
4My Sister's Hero Is Her Onii-sama!Jul 27, 2012 · 25m · ★ 9.0Shogo has ruined his relationship with Miyabi; after letting Konoe know about his secret, a new problem has arisen.
5My Little Sister Won't Let Me SleepAug 17, 2012 · 25m · ★ 9.0He thought it was over but his little sister keeps calling. Shogo discovers someone else has the same prototype phone as Konoe.
6My Neko-mimi Maid SistersAug 24, 2012 · 25m · ★ 9.0Lyrical Sisters is on the verge of shutting down, Shogo puts together and executes a plan worthy of the Mikadono name.

Nakaimo: My Little Sister Is Among Them! poster

Is insanity hereditary? Shougo Mikadono's beginning to think so, because the terms of his late father's will seem crazy and following them may drive Shougo bonkers as well. Oh, it sounds simple at first: before Shougo can claim his VERY large inheritance, he just has to start attending a certain new school and find a nice girl to marry. It's a little unromantic, but perfectly do-able, right? After all, all the girls seem quite friendly, so all Shougo has to do is find one he has something in common with. Except, and here's the kicker, it turns out that Shougo has WAY too much in common with one of them, because she's actually his long-lost sister! And he has no idea which one she is! Will Shougo meet and court his Miss Right without committing something very morally wrong? Can he find his future bride without slipping into the wrong set of genes? And if his little sister does reveal herself, just how much will be revealed and under what circumstances?

Genres: Drama, Animation, Comedy
Status: Ended
Original title: この中に１人、妹がいる！
First aired: July 6, 2012
Last aired: September 28, 2012
Seasons: 1
Episodes: 12
Episode length: 25m
Language: Japanese
Countries: Japan
Networks: TBS, MBS, CBC, BS-TBS
Production: Studio Gokumi