"I've been curious about you since the first time we met, I just couldn't stand it anymore..." While her college student daughter, Mitsuki, is at a club retreat, Mitsuki's boyfriend, Daiki, comes to the house and attacks Yurika. "What's so good about an aunt like me? Please stop!" She tries to refuse, but she is forcefully violated by the young and strong Daiki. "Don't ever do this again? Let's keep this a secret between the two of us?" Yurika tries to cover it up for Mitsuki's sake, but the long-awaited pleasure makes the depths of her body hot and flushed, and instead...