A nephew who has been staying for a week to take care of his aunt (Matsuzawa Yukari) who is undergoing medical treatment. On the first day, he was asked to change her diapers and take care of her but he couldn't help getting an erection. His aunt compels him to drink her urine saying "drink my pee!" He does his best to drink the piss and catches a special feeling. It is two people who get closer and closer in distance little by little with each opportunity. It was the first experience for his aunt, she gives such a superb blowjob. He licks her unwashed pussy and anus and is rewarded with refreshing piss. However, by the time her nephew began to love the taste of his aunt's piss was the day it was time for him to leave .... DUGA