Series

ONIMAI: I'm Now Your Sister!

★ 7.4(63)202324m1 season

ONIMAI: I'm Now Your Sister! is streaming on Crunchyroll and Crunchyroll Amazon Channel in United Kingdom. Availability checked 21 July 2026.

Where to watch ONIMAI: I'm Now Your Sister!

🇬🇧 United Kingdom

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Good to know

Release date: 2023-01-05
Runtime: 24m
Language: Japanese
Seasons: 1
Episodes: 12
Network: AT-X
Status: Ended
Country: Japan
Studio: Studio Bind

ONIMAI: I'm Now Your Sister! — trailer

About ONIMAI: I'm Now Your Sister!

ONIMAI: I'm Now Your Sister! is a 2023 web series in the Animation and Comedy genres, starring Marika Kouno, Kaori Ishihara and Hisako Kanemoto. It spans 1 season and 12 episodes, and originally aired on AT-X. It holds an average rating of 7.4/10 from 63 viewers. Below you can see where to watch ONIMAI: I'm Now Your Sister! in United Kingdom — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.

Synopsis

When lazy, erotic-game loving Mahiro Oyama is transformed into a girl by his younger scientist sister's experiments, he becomes determined to change back, only to recognize that with his new opportunity, he may want to turn his life around.

Seasons (1)

Season 112 eps · 2023

Cast

Marika Kouno

Mahiro Oyama (voice)

Kaori Ishihara

Mihari Oyama (voice)

Hisako Kanemoto

Kaede Hozuki (voice)

Minami Tsuda

Momiji Hozuki (voice)

Kana Yuuki

Asahi Ohka (voice)

Natsumi Hioka

Miyo Murosaki (voice)

Themes & keywords

slice of lifemiddle schoolbased on mangajunior high schoolschool lifeecchianimegender swapage changegrandmiddle school girlsjapanese junior high schoolerenraged