Ten years have passed since Sayoko lost her husband. Her only son, Hiroyuki, whom she has been raising alone, has secured a job at her uncle's company, and Sayoko has finally reached the end of her child-rearing duties. However, her peaceful days are short-lived as Hiroyuki makes a serious mistake at work. When her uncle Yoshio comes to visit, he confronts her, but the naive Sayoko is powerless to do anything. Yoshio, who has been secretly eyeing Sayoko, takes this opportunity to begin groping her voluptuous breasts, saying, "It's up to the mother to clean up after her son's mistakes."