Aoi Nishimori and Shusei Kugayama are in love and they begin to live together secretly. Suddenly, Shusei's cousin Reon Kugayama comes to them. Their secret is discovered by Reon. Now, Aoi, Shusei and Reon begin to live together.

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.

Akemi suffers from a sense of loss after his cat dies. He decides to buy a used book and discovers a business card inside the book. The phrase of the book, which touched Akemi, has been underlined. Akemi becomes curious about the person Akane from the business card. He decides to contact her and they meet. Akane is a woman with a bright personality and Akemi develops feelings for her, but they are both in relationships. Akemi is dating Yayoi and Akane is dating Yuji. Akane's boyfriend Yuji doesn't have much time left to live.