Every day is the same, ordinary life. Frustrated housewife Chieko is hungry for excitement. After seeing her husband off as usual, she starts masturbating in search of excitement. At that moment, the doorbell suddenly rings. Still hot, she goes to greet a visitor, and the postal worker who always delivers her letters is standing there. It was meant to be an ordinary weekday afternoon, but... Chieko invites the postal worker into her home and seduces him, and once she gets a taste of it, she even has her eye on her neighbors.