Onii-chan wa Oshimai!

Mahiro Oyama is an ordinary man who enjoys playing erotic games. After waking up transformed into a woman, he discovers that his younger sister, Mihari, a self-proclaimed mad scientist, conducted an experiment on him. The transformation is unwanted and causes significant disruption in his life. Mihari remains committed to her research, while Mahiro wants to return to his reclusive lifestyle centered around gaming. Their conflicting goals create tension and lead to increasingly strange situations as the story progresses.

Traduzione in corso — testo originale in inglese.