Former high school classmates, now adults, hold jealous thoughts, hidden intentions and lust for revenge. Graduates from a high school have held reunions since they graduated 10 years ago. The high school itself is located 2 hours from Tokyo by train and past reunions were held by different teams for different areas. An upcoming reunion is the first time where everyone will gather again.

Little Trip: Chairperson Ayako and Yuki, who sometimes skips school, become close. They run away. Rakugaki Uwagaki: Satomi used to be a member of art club, but she stopped drawing. Due to a cultural festival, she decides to draw again. Baion: Kuroi likes recording the sounds of daily life. One day, she meets Rika. Rika begins to enjoy recording the sounds of daily life with Kuroi.