Oniichan wa Oshimai!

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!

Other names: Oniichan wa Oshimai!
Status: Ongoing
Country: Japan
Date Release: 2023
Episode: 012 / ~

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