In order to pay off her husband's debt from a failed investment, she was forced to sell all of her assets and move into a four-and-a-half-tatami-mat apartment. The ex-business partner, having his eyes on his wife Rin's beautiful body, begins to bring in customers to the apartment day after day. In this extremely cramped space, the wife offers her pussy to the customers, who buy it for money and have sex with it. And the husband watches on helplessly as his wife is cuckolded. The husband watches as his wife is cuckolded....