A salesman named Kosuke Okuda happens to meet Mao Watarai, a friend from his middle school days. Back then Mao was bullied, but now she is an attractive woman. Kosuke and Mao fall in love and decide to marry, but Mao has a secret.
Mitsuki is shy and rather isolated at school. Towa is on the basketball team and Mitsuki's class-mate. Due to circumstances, Mitsuki soon begins to socialize with four jocks of the basketball team, which affects her self-esteem, her social status, her loneliness and her life. She finds a new lease in her school life.