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ONIMAI: I'm Now Your Sister!

Mahiro Oyama, a reclusive fan of erotic games, wakes up one day to discover his body has been transformed into a woman's. The bizarre change is the result of a reckless experiment conducted by his eccentric younger sister, Mihari, who is determined to observe the effects of her invention.

Now forced to navigate daily life in a new form, Mahiro scrambles to reclaim his solitary gaming routine while dealing with Mihari's relentless curiosity. The series blends lighthearted comedy with risqué moments, delivering a slice‑of‑life look at gender confusion, sibling rivalry, and the absurdities that arise when science goes awry.