One day, Ai, a new wife who is in a common-law marriage with her boyfriend, visits his parents' house to announce their marriage. However, his father strongly disapproves because she is too young. Ai, who can't give up, lets him go home first and approaches her father alone. She seduces her father-in-law while showing a glimpse of her true nature: ``She actually likes older people.'' Her father-in-law, whose sense of reason has collapsed, stirs her vagina with his thick cock, and while her face turns red, he thrusts into her... or so...