College student and private tutor Amaharuno Ai thought she could easily handle even elementary school level students. But in reality, her assigned pupils Shota and Miyo were nothing short of mischievous brats. One day, after losing her temper and hitting Miyo, Amaharuno had the entire incident recorded on Shota's smartphone, giving him leverage over her. From that point on, the troublemakers began relentlessly tormenting Amaharuno with lewd pranks targeting her prized big breasts, gradually deepening their twisted relationship. Faced with this situation, Amaharuno resolves to become stronger in order to protect herself.