ONIMAI: I'm Now Your Sister!

Alt title: Onii-chan wa Oshimai!

TV (5+ eps)
2023 - ?
Winter 2023
3.693 out of 5 from 391 votes
Rank #2,932

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 Mahiro’s 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 thing’s for sure…life is going to get a whole lot weirder from here on out!

Source: Kodansha

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