ONIMAI: I'm Now Your Sister! (2023)
A charming 2023 anime comedy in which a reclusive gamer is unexpectedly transformed into a girl, setting off a warm and funny journey of rediscovery.
ONIMAI: I'm Now Your Sister! - Series Information
- Original Title: お兄ちゃんはおしまい！
- First Air Year: 2023
- Last Air Year: 2023
- Type: TV Series
- Genres: Animation, Comedy
- Content Rating (US): TV-14
- Episode Runtime: Average runtime per episode: 24 minutes
- Number of Seasons: 1
- Number of Episodes: 12
- Status: Ended
- Original Language: Japanese
- Spoken Languages: Japanese
- First Air Date: January 5, 2023 (United States - TV-14), January 5, 2023 (Canada - 14+), January 5, 2023 (Germany - 16), January 5, 2023 (France - 12), January 5, 2023 (Australia - M), January 5, 2023 (Brazil - 14), January 5, 2023 (Mexico - B-15), January 5, 2023 (South Korea - 19)
- Networks: AT-X
- Alternative Titles: 不当哥哥了！ (CN), 오빠끝 (KR), Onii-chan ha Oshimai! (JP), Onii-chan Is Done For! (US), ¡Ahora soy tu hermana! (ES)
- Production Companies: Studio Bind, EGG FIRM, Ichijinsha, TOHO, Hakuhodo DY Music & Pictures, AT-X, BS11, PIA Corporation, Pony Canyon, movic
- Production Countries: Japan
ONIMAI: I'm Now Your Sister! - Plot
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! - Trailer
Watch the official trailer and see the transformation that sets everything in motion:
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ONIMAI: I'm Now Your Sister! - Cast & Crew
Main Cast
- Marika Kouno
- Kaori Ishihara
- Hisako Kanemoto
- Minami Tsuda
- Kana Yuuki
- Natsumi Hioka
- Yoshie Saito
- Misaki Watada
- Miyuu Takatsuki
- Rena Aoshima
Writers
- Michiko Yokote
- Miharu Hirami
Executive Producers
- Kazunari Okuma
- Fuminori Yamazaki
- Katsuyuki Imai
- Sosuke Asano
- Asuka Yamazaki
ONIMAI: I'm Now Your Sister! - FAQs
What is ONIMAI: I'm Now Your Sister! about?
ONIMAI follows Mahiro Oyama, a reclusive adult gamer who is accidentally transformed into a girl by his younger scientist sister Mihari. The series blends slice-of-life comedy with a surprisingly warm story about rediscovering everyday life, friendships, and personal growth through an unexpected second chance.
Is ONIMAI: I'm Now Your Sister! based on a manga?
Yes, ONIMAI: I'm Now Your Sister! is adapted from the manga series Onii-chan wa Oshimai! by Nekotofu, serialized in Monthly Comic Rex. The manga began publication in 2017 and continues to run, with the 2023 anime produced by Studio Bind faithfully adapting its early chapters.
Where can you watch ONIMAI: I'm Now Your Sister!?
ONIMAI: I'm Now Your Sister! is available to stream on Crunchyroll and the Crunchyroll Amazon Channel via subscription. It can also be purchased on Amazon Video. Availability may vary by region, so checking JustWatch is recommended for the most current streaming options near you.
Who are the main voice actors in ONIMAI?
The principal voice cast includes Marika Kouno as Mahiro Oyama, Kaori Ishihara as Mihari Oyama, Hisako Kanemoto as Kaede Hozuki, Minami Tsuda as Momiji Hozuki, Kana Yuuki as Asahi Ohka, and Natsumi Hioka as Miyo Murosaki, among others.
How many episodes does ONIMAI: I'm Now Your Sister! have?
ONIMAI: I'm Now Your Sister! consists of 12 episodes across its single season, which aired from January 5 to March 2023. Each episode runs approximately 24 minutes, making the complete series a concise and easy watch at roughly five hours of total runtime.
Is ONIMAI: I'm Now Your Sister! worth watching?
ONIMAI earned strong praise from anime fans and critics for its surprisingly tender tone beneath its comedic premise. Viewers appreciated its warm character dynamics, charming slice-of-life pacing, and Studio Bind's polished animation. Fans of lighthearted comedy anime with genuine emotional depth tend to find it highly rewarding.
What is the content rating for ONIMAI: I'm Now Your Sister!?
ONIMAI: I'm Now Your Sister! carries a TV-14 content rating in the United States, indicating it may be unsuitable for children under 14. The series contains ecchi humor, suggestive situations, and mature comedic themes, though it is generally considered mild compared to other anime in the ecchi genre.
Will there be a Season 2 of ONIMAI: I'm Now Your Sister!?
As of the latest available information, a second season of ONIMAI: I'm Now Your Sister! has not been officially announced. The series concluded its first season in 2023 with its status listed as Ended. Fans hoping for a continuation are encouraged to follow official announcements from Studio Bind and the production committee.
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