"I will quit school today." Mizuki, who works as a physical education teacher at the school where her son's school attends, stood at the last podium. The reason Mizuki decided to retire was because of the sneaky bullying of Manabu. In place of his son, who couldn't stand the bullying that was getting worse day by day and tried to take his own life, his mother quit school and stood up to take revenge on her classmates. Using her own muscles, Mizuki finally locates the students' hangout and infiltrates without hesitation.
