Freshly appointed health teacher Ayuko is asked by the vice principal to concurrently serve as the school's industrial physician. She is then assigned to be supported by physical education teacher Yaza, whom she cannot refuse despite her reluctance. Soon after, Yaza suddenly confides in her, revealing his abnormal sexual desires and forcefully seducing a bewildered Ayuko. As their relationship gradually deepens, Ayuko finds herself inevitably drawing closer to Yaza—both to protect herself and to gain control over her own emotions. Entangled in feelings, duty, and workplace rules, an intense new development unfolds.