A certain city in the northern Kanto region ... Sumire, a chaste housewife who has been married for three years, lived peacefully with her hard-working salaryman husband. The current rental apartment that she signed at the beginning of her marriage was getting a little cramped, so Sumire spent her days looking for a new house and browsing various real estate properties in the city on weekends. The salesman of the real estate agency who was in charge of viewing the property had an unscrupulous feeling about the beauty of such a married woman. In a property that is being viewed, which is basically a closed room for two people, one day the salesman does not have patience ...!