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ONIMAI: I'm Now Your Sister!

Also known as Onii-chan wa Oshimai!

1 playable TV Finished 2023 Unrated

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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!

Studio
Studio Bind
Episodes
12 listed
Runtime
about 24 minutes per episode
Genres
Comedy, Slice of Life

Seasons & related series

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Characters & voices

Meet the characters and their Japanese voice actors.

Mahiro Oyama
Mahiro OyamaMain character
Marika Kouno
Marika KounoJapanese voice
Mihari Oyama
Mihari OyamaMain character
Kaori Ishihara
Kaori IshiharaJapanese voice
Kaede Hozuki
Kaede HozukiSupporting character
Hisako Kanemoto
Hisako KanemotoJapanese voice
Momiji Hozuki
Momiji HozukiSupporting character
Minami Tsuda
Minami TsudaJapanese voice
Asahi Ouka
Asahi OukaSupporting character
Kana Yuuki
Kana YuukiJapanese voice
Miyo Murosaki
Miyo MurosakiSupporting character
Natsumi Hioka
Natsumi HiokaJapanese voice
Nemu Fujimi
Nemu FujimiSupporting character
Mia Sakurai
Mia SakuraiJapanese voice
Minato Senkawa
Minato SenkawaSupporting character
Rika Abe
Rika AbeJapanese voice
Yuriko Kitahara
Yuriko KitaharaSupporting character
Rika Nagae
Rika NagaeJapanese voice
Yuuta Sakurada
Yuuta SakuradaSupporting character
Rena Aoshima
Rena AoshimaJapanese voice
Nodoka Fushimi
Nodoka FushimiSupporting character
Rina Tsukishiro
Rina TsukishiroJapanese voice
Raika
RaikaSupporting character
Kuon Erisa
Kuon ErisaJapanese voice
View more characters & voices

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