Yumi’s busy husband has little interest in sex, and her only relief from their distant marriage is time alone in the bath. One evening, her husband brings his subordinate Masaya home after drinking. Unaware that Yumi is bathing, Masaya dirties his suit and heads to the bathroom, where the two unexpectedly come face to face. With her drunken husband asleep, awkward tension hangs between them, but neither can forget the sight of the other’s body. Their excitement takes over, drawing them into a wet, intimate affair in the locked bathroom.