Onii-chan wa Oshimai!
お兄ちゃんはおしまい！
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)
Airing
TBA
Format
TV
Status
FINISHED
Start Date
5/1/2023
Season
WINTER 2023
Popularity
62571
Favourites
2620
Episodes
12
Studio
Studio Bind
Source
MANGA
Hashtag
#おにまい
Genres
Comedy
Ecchi
Slice of Life
Average Score
75
Romaji
Onii-chan wa Oshimai!
Native
お兄ちゃんはおしまい！
Tags
Gender Bending
Rehabilitation
Age Regression
Cute Girls Doing Cute Things
Primarily Female Cast
Primarily Teen Cast
Female Protagonist
Coming of Age
Hikikomori
Family Life
Transgender
Otaku Culture
Found Family
School
Crossdressing
Gyaru
Tomboy
LGBTQ+ Themes
Nudity
Chibi
Chuunibyou
Description
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)
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ONIMAI: I'm Now Your Sister!
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Onii-chan wa Oshimai! Kaki Oroshi Comic
MANGA
Characters
Mahiro Oyama
Female -
Mihari Oyama
Female - 15-16
Kaede Hozuki
Female -
Miyo Murosaki
Female -
Momiji Hozuki
Female - 13