Following a transfer this spring, Iyo, a married woman, begins working at the same school as her husband. Both work and home life were going smoothly until that incident occurred. That day, her husband witnessed Takahashi, the school's notorious delinquent, bullying someone. After a heated argument, her husband pushed Takahashi away, causing him to injure his finger. Apologizing profusely on her husband's behalf, Iyo is met with Takahashi's ultimatum: 'Show your sincerity by baring your chest to apologize.' Telling herself it's to protect her husband, she takes off her clothes and exposes her breasts, but the act was never going to end there...