ONIMAI: I'm Now Your Sister!

Name: ONIMAI: I'm Now Your Sister!
Genre: Animation, Comedy
Released: 2023-01-01
Rating: 6.7
Cast: Marika Kouno, Kaori Ishihara, Hisako Kanemoto, Minami Tsuda, Kana Yuuki

お兄ちゃんはおしまい！

2023| 1 season| IMDb 6.7

ONIMAI: I'm Now Your Sister! (2023) is currently available in the UK on Crunchyroll. Last updated 20 January 2026.

Streaming availability last checked 20 January 2026

Animation Comedy

Recluse Mahiro would rather lose himself in his video games than venture into the outside world. After emerging from his cocoon of a room, he’s shocked to see a teenage girl staring back at him in the mirror. What did his younger sister Mihari do to him? Mahiro should be angry, yet he’s curious about this second chance at life. Can he soar in this brave new world? He’s intrigued to find out!