Natsume, a married woman, is struck by the gaze of her neighbor in her apartment. She can't stop thinking about him, so she takes the plunge and drops her keys to seduces him in a playful way. Their feelings of attraction become intertwined, and she finally gives in to her impulses. The man and woman indulge in passionate, greedy sex with few words. When her husband goes on a business trip, she takes her time and indulges in a slow, sticky sex session.