One day, a smooth-sailing married life falls apart. Her husband, who runs a restaurant, is betrayed by a friend who is a moneylender, and is forced into bankruptcy with a huge debt. Wanting to somehow return to those happy times, Yumi meets the moneylender without her husband's knowledge. "If you want to help your husband, become my woman for the weekend!!" As long as she can endure it... With this thought in her heart, Yumi decides to offer her body to him. From that day on, her humiliating weekend as a substitute sex slave that will not end until she is pregnant begins...