Incredible 4K footage captures Kumiko's step-uncle Shouichi, once kind but now just a garbage collector. She despises him. Suddenly forced to live together for a week, Shouichi struggles to contain his hidden lust and unleashes his potent, foul-smelling erection on her. Overwhelmed by pent-up frustration and years of sexual tension, he thoroughly trains Kumiko to be his personal masturbation tool... Note that recording contents may vary depending on the distribution method.