One day, a man claiming to be a travel agent visits the home of Yui, a simple and kind married woman with a good reputation in the neighborhood, and offers her a "discount" on a travel ticket to Saipan, which he says he prepared by mistake. Yui, who has not been able to buy a wedding ring or go on a honeymoon since her marriage to Terukazu, is attracted to the trip. However, it turns out to be Kudo's trap... The trip was a lie, and he used cunning methods to make Yui owe him 5 million yen in debt. To repay the debt, he forced her to use her home as a store and manage the black market sex business where he works....
