Kazuki Umezono, a high-school student who loves himself above all else, meets Erina Kirimura, a girl being bullied behind the school building. After he intervenes to prove the strength of his self-love, Erina reappears six months later as a beautiful girl who calls herself his follower, drawing new relationships into Kazuki's once-solitary life in this coming-of-age romantic comedy.

A coming-of-age romantic comedy about a self-loving loner and the accomplished beauty devoted to him.

After high-school student Shinya Hayasaki loses his memory in an accident, he begins dating Segawa, a classmate who accepts him. Then her best friend, Yuki Aiba, tells him that she and Shinya had been romantically involved before his amnesia. On Mondays, Wednesdays, and Fridays, when Segawa has lessons, Shinya and Yuki begin a secret relationship in this school romantic comedy.

A boy and two girls, unsettled by lost memories, confront the future of their secret relationship.