ONIMAI: I'm Now Your Sister! (2023)

Original title: お兄ちゃんはおしまい！

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.

ONIMAI: I'm Now Your Sister!

Watch Providers

Crunchyroll

Crunchyroll Amazon Channel

Casting arrow_drop_down

as Mahiro Oyama (voice)

as Mihari Oyama (voice)

Hisako Kanemoto

Hisako Kanemoto

as Kaede Hozuki (voice)

as Momiji Hozuki (voice)

as Asahi Ohka (voice)

as Miyo Murosaki (voice)

as Tomoya Kiba (voice) as Child - Sister (voice) as Erotic Game Voice (voice) as Reporter (voice)

as Minori Shiina (voice)

Miyuu Takatsuki

Miyuu Takatsuki

as Satsuki Takada (voice)

as Yuta Sakurada (voice)

as Minato Senkawa (voice)

as Clerk (voice) as Woman B (voice) as Woman A (voice)

as Woman A (voice) as Hairdresser (voice) as Woman B (voice)

Rina Tsukishiro

Rina Tsukishiro

as Nodoka Fushimi (voice)

as Mai Yasaka (voice)

as Mari Nishinomiya (voice)

as Nemu Fujimi (voice)

as Waitress (voice) as Watch Stand (voice)

Mitsuki Nakamura

Mitsuki Nakamura

as Truant Officer (voice) as Announcer (voice)

as Miyako Nagase (voice)

Fumiko Uchimura

Fumiko Uchimura

as Takeshi Haijima (voice)

as Makoto Kodaira (voice)

as Seme (voice)

Hisayoshi Suganuma

Hisayoshi Suganuma

as Child - Brother (voice)

as Leonardo (voice)

Hironari Nemoto

Hironari Nemoto

as Movie Narration (voice)

as Spabone (voice)

as Nicolala (voice)

as Student A (voice)

as Student B (voice)

as Rin Minakata (voice)

as Clerk (voice)

as Yuriko Kitahara (voice)

as Landlady (voice)

Kosuke Kobayashi

Kosuke Kobayashi

as Announcement (voice)

arrow_drop_up

Seasons

Season 1

Season 1

Episodes season 1

1x1

Mahiro's confusing new body
1x2

Mahiro's time of the month
1x3

Mahiro's close encounter
1x4

Mahiro's new friend
1x5

Mahiro discovers adventure and social gatherings
1x6

Mahiro goes back to middle school
1x7

Mahiro's role-playing game
1x8

Mahiro's first girls sleepover
1x9

Mahiro rings in the new year
1x10

Mahiro ponders boobs and identity
1x11

Mahiro pretties up
1x12

Mahiro's future as a sister

Recomendation Series

NextFilm 2025