You are Takuya Aihara, an average junior college student with one character flaw: you’re a bit of a mental weakling. No matter how hard you try, it seems that all the girls around you are constantly pushing you around: your teasing step-sister Natsumi, the genius president of your chemistry club Mami, but especially Asuka, your beautiful childhood friend.
One fateful day, while cleaning some shelves in the chemistry room, you spill a mysterious chemical on yourself. The next thing you know, you’ve been transformed into a girl! And so begins this hilarious erotic adventure. As a woman, Takuya discoveres a new world of experiences, some welcome and others not. Can Takuya find a way back to normal, while avoiding the many temptations that come with his new female body? Can he find a way to express his feelings for Asuka, without hurting another who loves him?