ONIMAI: I'm Now Your Sister!
Also known as Onii-chan wa Oshimai!
TV Finished 2023 Unrated
Mahiro Oyama was just a normal erotic-game loving dude…until he woke up one morning as a woman! Turns out his mad-scientist little sister, Mihari, tried out one of her new experiments on him…with a disastrous outcome, as far as Mahiro’s concerned! But Mihari is as determined to study him as he is determined to go back to his shut-in, game-playing life, and one thing’s for sure…life is going to get a whole lot weirder from here on out!
Seasons & related series
Explore connected titlesCharacters & voices
Meet the characters and their Japanese voice actors.
Mahiro OyamaMain character
Marika KounoJapanese voice
Mihari OyamaMain character
Kaori IshiharaJapanese voice
Kaede HozukiSupporting character
Hisako KanemotoJapanese voice
Momiji HozukiSupporting character
Minami TsudaJapanese voice
Asahi OukaSupporting character
Kana YuukiJapanese voice
Miyo MurosakiSupporting character
Natsumi HiokaJapanese voice
Nemu FujimiSupporting character
Mia SakuraiJapanese voice
Minato SenkawaSupporting character
Rika AbeJapanese voice
Yuriko KitaharaSupporting character
Rika NagaeJapanese voice
Yuuta SakuradaSupporting character
Rena AoshimaJapanese voice
Nodoka FushimiSupporting character
Rina TsukishiroJapanese voice
RaikaSupporting character
Kuon ErisaJapanese voice
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