Rin is a full-time housewife living a peaceful life.Before marrying her husband, she had been involved with a good-for-nothing man and had indulged in pleasure. She accidentally reunites with her ex-boyfriend in the street. At first, she is wary, but she eventually lets her guard down around Hiroshi, who has seemingly turned his life around. Hiroshi, a master manipulator, takes advantage of her, and Rin becomes obsessed with his insatiable penis. Hiroshi repeatedly has unprotected sex with her, even on her dangerous days. One day, out of anxiety, she takes a pregnancy test, and the result is...