A door-to-door sales agent of sex toys came to a certain apartment. He starts testing his newly developed toy with his wife. In addition, the young wife who is curious about naughty things and is sniffing around the state of the married life next door will call the neighboring wives and have them suffer the shame of public sex. In addition, there are cases where women have sex with door-to-door sales agents with their husband's permission. And they involve married women in a vortex of shame.