Onii-chan wa Oshimai!

Mahiro Oyama enjoys playing erotic games until he wakes up transformed into a woman. His younger sister Mihari, a mad scientist, conducted an experiment on him that caused the change. She is eager to continue studying him, while he wants to return to his reclusive lifestyle. Their conflicting goals create tension as their situation becomes increasingly strange.

Traduzione in corso — testo originale in inglese.