Ryutsuki Kimigawa is a highschool student, which one day, thanks to a formula created by his friend Yamada, becomes a girl. He was planning with his friends to go to Okinawa for the summer vacations, however, all of their plans are changed, and with it, a bigger problem comes up. What's going to happen on their trip?

Ryutsuki Kimigawa is a highschool student, which one day, thanks to a formula created by his friend Yamada, becomes a girl. How is he going live with this big change on his life?!