housewife and underwear thief

Kaoru is a married woman whom a boring door-to-door salesman happens to meet at his destination. The man, transfixed by Kaoru's voluptuous breasts, finds Kaoru's underwear hanging out to dry in the garden and is drawn to it as he picks it up. A man buries his face in his underwear and imagines Kaoru's lewd behavior. Just as I was suddenly coming to my senses and throwing my underwear into my bag, I witnessed the moment Kaoru brought in the person he was cheating on with. A man sneaks in through a window that happens to be open and peeks into the two's love affair in the bedroom, and comes up with the idea of ​​using this to blackmail Kaoru...