Oniichan wa Oshimai!

Onimai: I'm Now Your Sister!

お兄ちゃんはおしまい！

TV 12 episodes 23 min per ep 2023 Finished Airing

7.64 /10 (93,642 users)

Comedy

Where to Watch

Crunchyroll Funimation Netflix Hulu

Synopsis

Self-professed "home security guard" Mahiro Oyama has not left his home in years, secluding himself in his room playing erotic visual novels. This depraved lifestyle causes his prodigious sister, Mihari, to worry about his well-being. In hopes of solving this problem, she devises a plan to rehabilitate him back to normalcy.

The first part of Mihari's plan is to concoct a medicine that changes her brother's biological constitution into a bona fide female, much to Mahiro's vehement dismay. Stuck in this predicament, Mahiro has no choice but to live out his life as a cute girl until the effect wears off—if it ever does.

[Written by MAL Rewrite]