Kana is an engaged woman whose only son is planning to get married this fall. - Before getting married, a young man and woman were happily going to wedding halls in the city on weekends to discuss things like receptions and presents. - The father-in-law is always staring at the young and fresh female body of his son, with a moist and insidious gaze. - One day, when the son went to work leaving Kana behind, the father-in-law found an erection that was embarrassingly hard despite his age...!