Release #6 - ONIMAI: I'm Now Your Sister! 6

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!

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6: ONIMAI: I'm Now Your Sister! 6

0 views • Aug 27, 2025

It's his first summer break as a schoolgirl! Former twenty-something shut-in Mahiro Oyama was transformed into a girl by an experimental drug, and every day he's getting closer to being the model citizen his sister hoped to create! From late spring cleaning to early summer homework, gardening to junior high relationships, he can handle it all…but can he survive a trip to the beach with the girls?!