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ONIMAI: I'm Now Your Sister!

202324m / epAnimation · Comedy

First aired

January 5, 2023

7.4

TMDB Score

74% match · 66 votes

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S01 · E09

Mahiro Rings in the New Year

Season 1 · Mar 2, 2023 · 23m

Mahiro's Confusing New Body

Jan 5, 2023 · 23m

Mahiro's Time of the Month

Jan 12, 2023 · 23m

Mahiro's Close Encounter

Jan 19, 2023 · 23m

Mahiro's New Friend

Jan 26, 2023 · 23m

Mahiro Discovers Adventure and Social Gatherings

Feb 2, 2023 · 23m

Mahiro Goes Back to Middle School

Feb 9, 2023 · 23m

Mahiro's Role-Playing Game

Feb 16, 2023 · 23m

Mahiro's First Girls Sleepover

Feb 23, 2023 · 23m

Mahiro Rings in the New Year

Mar 2, 2023 · 23m

Mahiro Ponders Boobs and Identity

Mar 9, 2023 · 23m

Mahiro Pretties Up

Mar 16, 2023 · 23m

Mahiro's Future as a Sister

Mar 23, 2023 · 23m

It's Christmas and Mahiro is shocked to hear his own little sister has a date. Unable to shake his unease, he follows her through the festive hustle and bustle in secret, with Momiji as his escort in tow. Who could Mihari possibly be meeting with?

About the Series

ONIMAI: I'm Now Your Sister! poster

AnimationComedy

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.

First aired: January 5, 2023
Last aired: March 23, 2023
Seasons: 1 season · 12 episodes
Status: Ended
Original language: Japanese
Network: AT-X

Top Billed 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)

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