Shuhei, a man living in an apartment complex, overhears his neighbors one night and becomes aroused imagining the wife, Erika, whom he recognizes. Though not close, he has secretly desired a sexual relationship with her. Suddenly, his wish presents itself when Erika comes to thank him for helping with cleaning the shared areas—and answers the door braless. Visibly excited by her appearance, Shuhei finds himself thrilled at the night's unfolding events.