JUQ-787 For the sake of her beloved husband, she becomes a substitute for him on the weekends. She is repeatedly creampied by a super-sexual, evil old man until she becomes pregnant… Ai Mukai – Mukai Ai

One day, a smooth-sailing married life falls apart. The husband, who runs a company, is betrayed by a trusted friend who is a moneylender, and is forced into bankruptcy with a huge debt. Wanting to somehow return to those happy times, the wife, Ai, 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, Ai 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…