Re-married couple Yuri and her husband enjoyed a good relationship and decent sex life. However, she grew increasingly dissatisfied with their strictly protected sex—her husband didn't want children, and always used condoms. Yuri didn't necessarily want kids either, but she deeply craved the sensation of bareback sex. Through a women's social group, she became close with the Uematsu couple, eventually spending time together as families. After one drinking session, a casual dirty joke from her husband sparked the beginning of an affair. Uematsu Tsutomu, like Yuri, preferred unprotected sex, and the two quickly became lovers. As the affair continued, her husband eventually discovered the truth. Witnessing his wife climaxing from being creampie by another man for the first time, he became strangely aroused—igniting his own hidden cuckold desires.