Shuichi, who looks as cute as a girl on the outside, also yearns deep down to become a girl. On the other hand, Kane, who appears as cool and handsome as a boy but has a feminine heart, wishes to become a boy. With the encouragement of Chiba, the odd one out in the class (?), the two secretly travel to a distant town to switch identities, relieving their inner desires. However, as Kane's menstrual cycle arrives, Shuichi becomes increasingly depressed about the reality of having a male body but a female heart.