X Change

Takuya Aihara is an average junior college student with one major flaw: he is a weakling. No matter how hard he tries, the girls around him constantly push him around, including his teasing step-sister Natsumi, the genius chemistry club president Mami, and especially his beautiful childhood friend Asuka. He just cannot seem to assert himself.

One fateful day, while cleaning shelves in the chemistry room, Takuya spills a mysterious chemical on himself. The next thing he knows, he has transformed into a girl. This begins an erotic adventure where poor Takuya gets very interesting lessons in anatomy and sex education.

As a woman, Takuya discovers a new world of experiences, some welcome and others not. He must find a way back to normal while avoiding the many temptations that come with his new female body, and also find a way to express his feelings for Asuka without hurting another who loves him.