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 office worker husband. Since the current rental apartment that she had contracted when she got married has become a little cramped, Sumire spends her days looking for her new home and previewing various real estate properties in the city on weekends. The sales man of the real estate agent who was in charge of the preview of the property had a bad feeling about such a beautiful married woman. One day, the salesman couldn't bear to persevere at the property being previewed, which was basically a closed room for just the two of them...!
