Onimai: I'm Now Your Sister!

お兄ちゃんはおしまい！

Oniichan wa Oshimai!

193 chapters

11 volumes

2018 – present

In "Onimai: I'm Now Your Sister!," Mahiro Oyama, a dedicated player of erotic games, awakens one day to discover they have been transformed into a girl. This drastic change is the result of an experiment carried out by Mihari, Mahiro's scientifically inclined younger sister. While this transformation is a catastrophe for Mahiro, Mihari remains committed to studying its effects, as Mahiro longs to return to their solitary life of gaming. With these opposing objectives, Mahiro's world is poised to become even more strange and unpredictable.

Information

Status: Publishing
Format: Manga
Chapters: 193
Volumes: 11

Statistics

Rank: #1235
Score: 7.90
Votes: 8,185
Members: 25,142
Favorites: 1,111

Authors

Nekotoufu

Adapted to anime

Onimai: I'm Now Your Sister!

Volúmenes & Capítulos14 vol · 260 ch

Volume 0.0

Buy (Amazon) Read digital

Gallery

Background

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.