Shuuichi Nitori is a boy who wants to be a girl and Yoshino Takatsuki is a girl who wants to be a boy. They meet in grammar school and learn one another's secrets. They become able to confide in each other as they grow up.

Yoshino and Saori have started their new lives in middle school. Things continue to be awkward as they go through their day to day. They join the various teams at the start of the semester; Yoshino to basketball and Saori to volleyball.