Busty wife Riho Fujimori is taken by another man. While visiting her brother-in-law with her husband, her kinky spouse makes her entertain their host with vibrators strapped all over her body. The aroused couple later have rough sex, and Riho cums wildly while squirting heavily. Ordered by her husband to go without panties, she is left alone with his brother and gets caught masturbating in the living room. That night she dresses as Nanahikari from SF Sex Fighter and is blackmailed into reluctantly servicing him. His cock turns her on until she loses control in the arms of a man other than her husband.