Oniichan wa Oshimai!

Onimai: I'm Now Your Sister!
お兄ちゃんはおしまい！
Onii-chan is Done For

Manga7.98057 votesPublishing

ComedyCGDCTMagical Sex Shift

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About this title

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)

Publication notes

Oniichan wa Oshimai! is a web manga released on the author's pixiv account since February 25, 2017, and published in print by Ichijinsha since June 27, 2018. The web manga has also been published as doujinshi since May 6, 2017, when the first volume was released at COMITIA 120. The series has been published digitally in English as Onimai: I'm Now Your Sister! by Kodansha Comics USA since August 31, 2021.

Published

Jun 27, 2018 to ?

Authors

Nekotoufu

External links

MyAnimeList page KodanshaKodansha USA Wikipedia Wikipedia

MAL rank: #1290
Members (MAL): 24,451
Favorites (MAL): 1,066

Related titles

Adaptation

Oniichan wa Oshimai! (anime)

Other

Oniichan wa Oshimai! Koushiki Anthology Comic

Main characters

Mahiro Oyama1345 fan favorites
External profile
The protagonist of Onii-chan wa Oshimai. He was turned into a girl thanks to his little sister by drugging him. Age: Around 20 Birthday: March 6th Blood Type: O Height: 144 cm Weight: 38 kg Gender: born male transformed into female School Grade: finished school for more than 2 years, entered Jr high school as a female Interests: Video Games, sleeping late
Mihari Oyama212 fan favorites
External profile
Birthday: April 22 Blood Type: AB The little sister of Mahiro, the girl responsible for her older brother's transformation to a girl. She keeps a lookout on him and supervise him on his new life as a girl.