Yuri (Hayama Sayuri) is fighting over her husband Takahiro's visits to brothels. Unable to bear the situation, Takahiro's best friend Michikawa steps in to mediate... The situation is resolved amicably, but Michikawa, who has been interested in Yuri for a long time, suddenly kisses her as a thank you for making up. She desperately resists, but her voluptuous body, which is usually left unseen by her husband and used to comfort herself alone, cannot resist the pleasure. Yuri feels guilty about her husband not knowing anything, but the joy of infidelity gradually takes over her body...