Yuichi decided to stay at Mr. and Mrs. Nakano's house until his uncle's long-term business trip was over. It's almost time for my uncle's business trip to end. I have to find a sloppy house, but ... Yuichi was soaring to live alone with his aunt Nanao, who was secretly longing for him. My longing for Nanao grows day by day, and every day I comfort myself with the used underwear of Nanao, even though I know it is a bad thing. One day, Nanao finds himself masturbating as usual.