The ex-boyfriend of Yoshikawa, who got married within the company, is a colleague of her husband. After sending her drunk husband home, the ex-boyfriend assaults her and they have sex, with her indulging in pleasure without her father-in-law or husband finding out. Meanwhile, the father-in-law, lusting after his daughter-in-law's body, notices her infidelity but remains silent, also wanting to penetrate her. The daughter-in-law, repeatedly raped, still can't get enough pleasure and reaches orgasm.
