Oniichan wa Oshimai!

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Oniichan wa Oshimai!

Other names: Onii-chan is Done For,
English name: Onimai: I'm Now Your Sister!
Japanese name: お兄ちゃんはおしまい!

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. Mahiro Oyama was just a normal erotic-game loving dude...until he woke up one morning as a woman! Turns out his mad-scientist little sister, Mihari, tried out one of her new experiments on him...with a disastrous outcome, as far as Mahiros concerned! But Mihari is as determined to study him as he is determined to go back to his shut-in, game-playing life, and one things for sure...life is going to get a whole lot weirder from here on out!

Type: TV
Studio: Studio Bind
Date aired: Jan 5, 2023 to Mar 23, 2023
Year aired: 2023
Status: Completed
Genre: Comedy
Country: Japan
Premiered: Winter 2023
Duration: 23 min/ep
Source: Manga
Rating: PG-13 - Teens 13 or older
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