Main characters rents a room and works at a part-time job. The same apartment inhabitants Riho and Sayaka visit his job location where they become targets of nanpa. Protagonist protects them and kicks nanma men out, but gets in a traffic accident with a running bike and breaks a leg. He awakens at a hospital where female doctor is so grateful for saving Riho and Sayaka that she helps him lose virginity... twice. Immovable protagonist looks around and notices Riho and Sayaka who happen to be nurses at this hospital. This summer is going to be wild.