Onimai: I'm Now Your Sister! poster

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

Animation · Comedy

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.

IMDb rating: 6.7 (975 votes)
Episode average: 7.1 +0.4 vs IMDb
Seasons: 1
Streaming (US): Crunchyroll
Language: JA
Type: Mini-series

Rating trend: this show's seasons do not settle into one shape. Rising Shows ranks whole shows by the shape of their rating trend rather than one average score, which is how you find a show that got better rather than a show that started well.

Browse shows by rating shape → Open in Rising Shows app → View on IMDb

Ratings refreshed Oct 3, 2026 · 1 season indexed

Cast

Seasons

Season 1 (2023)

7.07 avg 12 episodes 6.7 → 7.3 23 min avg

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
1	Mahiro's Confusing New Body	6.7	148
2	Mahiro's Time of the Month	7.1	114
3	Mahiro's Close Encounter	7.2	109
4	Mahiro's New Friend	7.1	113
5	Mahiro Discovers Adventure and Social Gatherings	7.0	99
6	Mahiro Goes Back to Middle School	6.6	102
7	Mahiro's Role-Playing Game	7.0	103
8	Mahiro's First Girls Sleepover	7.1	97
9	Mahiro Rings in the New Year	7.5	119
10	Mahiro Ponders Boobs and Identity	7.1	101
11	Mahiro Pretties Up	7.1	94
12	Mahiro's Future as a Sister	7.3	114