7.7 average score on AniList
ONIMAI: I'm Now Your Sister!
お兄ちゃんはおしまい！
Read it on
1 official place
✓ Official English release
Track your progress on AniList ↗ free account · keeps your reading list in one place
Is there an anime?
Yes, an adaptation exists, but it is not in our index yet.
The same story, elsewhere
Every prequel, sequel, side story and spin-off AniList knows about.
- Side story Onii-chan wa Oshimai! Tokubetsu-hen manga · on AniList ↗
- Side story Onii-chan wa Oshimai! Tanjoubi manga · on AniList ↗
- Side story Onii-chan wa Oshimai! 7-kan: Tokusouban Shousasshi manga · on AniList ↗
- Side story Onimai Fukudoku Hon: Mihari no Kenkyuushitsu manga · on AniList ↗
- Side story Minato-kun wa Oshimai? manga · on AniList ↗
- Spin-off Onii-chan wa Oshimai!: Koushiki Anthology Comic manga · on AniList ↗
Who is in it
Tap a face to see every other story that character turns up in.
Mahiro Oyama 
Mihari Oyama 
Kaede Hozuki 
Chitose Azuma 
Rin Minakata 
Miyo Murosaki 
Nodoka Fushimi 
Mari Nishinomiya 
Yuuta Sakurada 
Miyako Nagase The facts
- Status
- Still releasing
- Chapters
- Not counted
- Volumes
- —
- First released
- 2017
- Country
- Japan
- Format
- manga
- Author
- Nekotofu
- AniList favourites
- 802
What it is about
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)
You may also like
Closest manga by genre, most-read first.
