ONIMAI: I'm Now Your Sister!
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.
Where to watch in Japan
Available to stream with Hulu, U-NEXT, Anime Times Amazon Channel, dAnime Amazon Channel, Amazon Prime Video.
Hulu
U-NEXT
Anime Times Amazon Channel
dAnime Amazon Channel
Amazon Prime Video Streaming in other countries
Sorted by distance from 
Japan
KR South Korea
TW Taiwan
HK Hong Kong
RU Russia
TH Thailand
PG Papua New Guinea
ID Indonesia
AU Australia
Showing 10 of 66 countries.
Cast, directors & writers
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)
Hiroaki Miura
Seme (voice)
Hisayoshi Suganuma
Uke (voice)
Reimi
Child - Brother (voice)
Emiri Suyama
Woman A (voice), Clerk (voice), Woman B (voice)
Yuuya Uchida
Leonardo (voice)
Hironari Nemoto
Movie Narration (voice)
Erisa Kuon
Woman A (voice), Woman B (voice), Hairdresser (voice)
Kousuke Goto
Spabone (voice)
Enako
Nicolala (voice)
Yoshie Saito
Reporter (voice), Child - Sister (voice), Erotic Game Voice (voice)
Yuri Ise
Student A (voice)
Ren Arata
Student B (voice)
Rina Tsukishiro
Nodoka Fushimi (voice)
Misaki Watada
Minori Shiina (voice)
Shingo Fujii
Director
Komawo Yukihiro
Director
Yasuhiko Akiyama
Director
Ayumu Uwano
Director
Hayato Kakita
Director
Nobuyoshi Arai
Director
Hironori Tanaka
Director
Aose Sakaguchi
Director
Eri Irei
Director
Michiko Yokote
Writer
Miharu Hirami
Writer
Keywords
About streaming ONIMAI: I'm Now Your Sister! in Japan
In Japan, the listed subscription streaming options for ONIMAI: I'm Now Your Sister! are Hulu, U-NEXT, Anime Times Amazon Channel, and dAnime Amazon Channel.
Amazon Prime Video is listed with a free streaming offer for ONIMAI: I'm Now Your Sister! in Japan. Check the service for account requirements.
Anime Times Amazon Channel and dAnime Amazon Channel are listed as channel options. Check the channel's subscription requirements on its host platform before signing up.
These listings are for the show and do not confirm that every season or episode is included. Use the season selector to check a specific season.
Our listings also show streaming in 65 other countries, including South Korea, Taiwan, and Hong Kong. Follow the country guides below to compare providers.
Automatically summarized from TMDB watch-provider listings supplied by JustWatch. Listings fetched . Streaming availability can change. Rental and purchase offers are not included.