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

Onimai: I'm Now Your Sister! (お兄ちゃんはおしまい!, Onii-chan wa Oshimai!) is a Japanese manga series written and illustrated by Nekotofu. The series has been serialized online since 2017; it is also currently serialized in Ichijinsha's Monthly Comic Rex magazine since April 2019. It is licensed in English by Kodansha USA. An anime television series adaptation by Studio Bind premiered in January 2023.