Fifth grader Nitori Shuuichi is a rather feminine boy who looks good in girl's clothes, enjoys things like baking, and tends to have mostly female friends. He and his sixth grade sister Maho transfer to a new school, where Shuuichi ends up sitting next to Takatsuki Yoshino, a tomboy that he gets along well with. Soon, they both discover each other's secrets, and find that they are not so different; in fact, they are very much the same. Neither Shuuichi nor Takatsuki can tell anybody their secret....