Their teenage daughter had a boyfriend, and the whole family had a good relationship. However, her boyfriend had a strong libido, and they had sex in her room many times. They could hear it in Yurine's bedroom, and her husband even muttered how amazing he was. One day, when she returned home from shopping, her daughter was not there and her boyfriend was masturbating by himself. Yurine panicked, but he came to her for advice, saying, "I'm worried about my strong libido. What should I do?"... She tried to calm him down by saying, "It's not strange for boys of that age to have such a strong libido," but her boyfriend's rampant sexual desire just wouldn't stop... While she desperately resisted, telling herself that she couldn't get it, her legs started shaking and she felt such pleasure that she couldn't stand...