After five years of marriage, faithful wife Mika has reached what seems to be the ideal age for having a baby. She lives with her kind, hardworking husband Kenichi and his father. Several times a week, the young couple have baby-making sex. After Kenichi cums inside her and falls asleep satisfied, Mika quietly slips out of bed. In the hallway late at night, her older, musty-smelling father-in-law roughly kisses her. Yes—the son's wife who is trying to conceive is also being creampied by her father-in-law.