A diligent step-father and husband start living together with a housewife. One day, she accidentally sees her step-father masturbating with her underwear. Noticing this, the step-father makes her drink sleeping pills, and her desperate days begin. Despite being disgusted by her perverted step-father's play, she blooms into a masochist. "It's all your fault, step-father... my pussy is throbbing and I can't sleep. What are you going to do about it?" The housewife starts to beg for it herself.