Wife Aya suffers from daily sexual frustration due to her husband's infertility. To relieve her tension, she dances sweat-drenched handclap routines each day, using the movement to release her pent-up desires. One day, her middle-aged neighbor, Hirai—a shy virgin—comes by to deliver a community notice. Unaware of his presence, Aya begins sensually swaying her fetishized body and starts masturbating. Hirai witnesses the entire act. When Aya suddenly realizes he's watching, she panics at first—but then, seizing his hand, she gives in to temptation and pulls him into a depraved encounter.