The head nurse, Hisae, is uncertain about her son's chances of getting into medical school, but the director promises him that he will pass, and she gives in to him for the sake of her beloved son. He forces her to give him a blowjob while she's at work, and he forces himself on her next to a patient's room, making her moan and cry. After receiving a mysterious letter from the director, who has cut off their relationship with her, Hisae can't help but masturbate. Then the director's son appears and seduces her, and she falls into the role of a lustful bitch...