Her teenage daughter had a boyfriend, and the whole family had a good relationship. However, her daughter's boyfriend had a strong sex drive, and they had sex in her room many times. They could hear it in Rieko'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 alone. Rieko panicked, but he came to her for advice, saying, "I'm worried about my strong sex drive. What should I do?"... She tried to calm him down by saying, "It's not strange for boys of that age to have a strong sex drive," but her boyfriend's rampant sexual desire continued unabated... While she frantically resisted, telling herself that she couldn't get it, Rieko's legs began to shake and she felt such pleasure that she could no longer stand...