Yuka Mizuno, a Takara Eizo exclusive production! Having lost her husband at a young age, Yuka was living with her daughter and son-in-law. She got along well with her daughter's husband, Jun, and lived a simple but happy life. One day, Yuka witnesses her daughter Jun arguing about sex. Apparently, his daughter didn't like sex and kept refusing whenever Jun asked. Worried, Yuka tried to talk to her daughter, but her daughter wouldn't listen to her. And then, by chance, Yuka stumbles upon Jun while he is pleasuring himself. Surprised and shaken, Yuka takes an unexpected action. "My daughter's actions are also my responsibility as her mother..." Yuka said, gripping Jun's foolish son. It started with just handjobs, but then it escalated to fellatio... and even full intercourse... Yuka desperately tried to resist Jun, who had become unstoppable, but...