A door-to-door salesman happens upon Kaoru, a married woman, in her garden. His eyes are drawn to her ample cleavage, and he notices her lingerie hanging out to dry, feeling an instant attraction. Picking up the underwear, he becomes entranced by its texture, burying his face in it as he fantasizes about Kaoru, losing himself completely. Snapping back to reality, he quickly hides the panties in his bag. At that moment, he witnesses Kaoru arriving with her lover, heading straight into the bedroom. Spotting an open window, the man sneaks inside and spies on the two as they begin their intimate encounter. This scene sparks a plan in his mind: to blackmail Kaoru.