Asuka lives with her father-in-law, Yoshio, in her husband's family home. She lives happily surrounded by a loving family, but there is one thing that just never seems to satisfy her. During sex with her husband, Asuka always feels an obscene desire to be penetrated by a big cock in a manly way. One day, she accidentally touches Yoshio's strong body... Her manly father-in-law's body makes her horny instantly. Yoshio gets an erection from Asuka's lewd invitation, and he loses himself and devours her...