ONIMAI: I'm Now Your Sister!
Also known as お兄ちゃんはおしまい！ | Onii-chan wa Oshimai! | Onimai: I'm Now Your Sister!
7.5/10
Community score
#1605
Rank
190.2K
Members
2.8K
Favorites
Synopsis
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!
(Source: Kodansha USA)
Production Notes
Oniichan wa Oshimai! was released on Blu-ray in two boxes from April 19, 2023, to June 21, 2023.
Cast Highlights
Oyama, Mihari
Main
Voice: Ishihara, Kaori (Japanese)
Oyama, Mahiro
Main
Voice: Kouno, Marika (Japanese)
Fujimi, Nemu
Supporting
Voice: Sakurai, Mia (Japanese)
Fushimi, Nodoka
Supporting
Voice: Tsukishiro, Rina (Japanese)
Haijima, Takeshi
Supporting
Voice: Uchimura, Fumiko (Japanese)
Hozuki, Momiji
Supporting
Voice: Tsuda, Minami (Japanese)
Hozuki, Kaede
Supporting
Voice: Kanemoto, Hisako (Japanese)
Kiba, Tomoya
Supporting
Voice: Saitou, Yoshie (Japanese)
Core Staff
Hatakeyama, Takurou
Producer
Hishiyama, Mitsuteru
Producer
Ootomo, Toshiya
Producer
Fukukura, Ryouma
Assistant Producer
Higashi, Mao
Assistant Producer
Nakagawa, Hazuki
Assistant Producer
Theme Songs
Openings
"Iden Tei Tei Meltdown (アイデン貞貞メルトダウン)" by Enako feat. P-maru-sama. (P丸様。)
Endings
"Himegoto * Crisisters (ひめごと＊クライシスターズ)" by Onimai Sisters
Latest Updates
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If You Liked This
Related Titles
Recent Episodes
Episode 1
Mahiro's Confusing New Body
Episode 2
Mahiro's Time of the Month
Episode 3
Mahiro's Close Encounter
Episode 4
Mahiro's New Friend
Episode 5
Mahiro Discovers Adventure and Social Gatherings
Episode 6
Mahiro Goes Back to Middle School
Episode 7
Mahiro's Role-Playing Game
Episode 8
Mahiro's First Girls Sleepover
Quick Facts
Ranking And Reach
Title Variants
English title
Onimai: I'm Now Your Sister!
Romaji title
Onii-chan wa Oshimai!
Japanese title
お兄ちゃんはおしまい！
Synonyms
Onimai, Onii-chan is Done For, Oniichan wa Oshimai!
Production Team
Main studio
Studio Bind
Producers
Pony Canyon, Movic, AT-X, TOHO animation, Tokyo MX, Hakuhodo DY Music & Pictures, BS11, Egg Firm, Ichijinsha, Bit grooove promotion, Pia, Toho Music
Licensors
Unknown
Japanese title
お兄ちゃんはおしまい！