Osaka high school's 2nd year class B had a "play" called the "Group chat Slave Contest", or Slavecon for short. A game in which the person who sends the most boring videos and images on the group chat becomes the slave of the entire class for a month. Yoichi Hatanaka (Aren), who was chosen as a slave, tries to commit suicide. In addition, Kasumi Saotome (Erina Kamiya), a third-year student at the same high school, had a bad relationship with her family, and was earning pocket money on her way home from school. One day, she got acquainted with a customer who is related to the "curse shop".
