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Onii-chan wa Oshimai! RSS Feed  
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Description

From Kodansha:
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.

Original Web Manga


Type
Manga

Related Series

Associated Names
Ab sofort Schwester!
Onii-chan Is Done for
Onii-chan Is Done for!
ONIMAI: I'm Now Your Sister!
Мой братик теперь не братик!
Мій братик вже не братик
お兄ちゃんはおしまい!
不当哥哥了!
别当欧尼酱了!

Groups Scanlating

Latest Release(s)
c.99.5 by daily multivitamin 6 days ago
c.98.5 by daily multivitamin 6 days ago
c.101 by daily multivitamin 2 weeks ago
Search for all releases of this series

Status in Country of Origin

9 Volumes (Ongoing)


Completely Scanlated?
No

Anime Start/End Chapter
Starts at Vol 1, Chap 1
Ends at Vol 4, Chap 38 - Skips Chap: 4, 8-8.5, 10.5, 18.5, 20.5, 24.5, 25.5, 26.5, 32-32.5, 33.5

User Reviews
N/A

Forum

User Rating
Average: 7.1 / 10.0 (93 votes)
Bayesian Average: 6.9 / 10.0
10
 
 
 
 16%
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8+
 
 18%
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 17%
6+
 
 
 
 12%
5+
 
 
 
 5%
4+
 
 
 3%
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 3%
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 1%
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 8%

Last Updated
July 2nd, 2025 12:12am PDT - 2 weeks ago

Series Image

Genre

Categories

Category Recommendations

Recommendations
N/A

Author(s)

Artist(s)

Year

Original Publisher

Serialized In (magazine)

Licensed (in English)
Yes

English Publisher
Kodansha USA (9 Digital Volumes; Ongoing)

Activity Stats (vs. other series)
Weekly Pos #601 decreased(-136)
Monthly Pos #1307 decreased(-316)
3 Month Pos #2153 decreased(-5)
6 Month Pos #2360 decreased(-185)
Year Pos #2616 increased(+43)

List Stats
On 723 reading lists
On 171 wish lists
On 8 completed lists
On 28 unfinished lists
On 125 custom lists

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