Wife Yurie, unsatisfied with her sex life with her husband. One night, her husband Kenzou accidentally catches her masturbating. In that moment, deep regret and anxiety surge within him. Lacking confidence, he feels guilty for failing to satisfy his wife. Gradually, his feelings transform into a desire: he wants to fulfill Yurie's sexual needs. He decides to ask Yoshio, his younger subordinate at work, to seduce her. Drawn to the young man's strong, passionate cock, Yurie surrenders to instinct over reason. Driven by forbidden desire, she longs to be penetrated. In that moment, she realizes once again just how unfulfilled she has been by her husband.