Her daughter has come of age, and Yuka, who has begun to feel tired of her ordinary life, secretly wishes to return to being a woman again. One day, I received advice from my daughter's boyfriend, Yusuke. While helping him overcome premature ejaculation in the process, the sexual desire hidden in Yuka's chest was violently shaken. The two gradually escalated and continued to practice to overcome premature ejaculation with various stages of play such as blowjobs, nipple torture, and licking the entire body, not just the hands.