Yuichi is allowed to stay at Mr. and Mrs. Nakano's house until his uncle's long-term business trip is over.His uncle's business trip is almost over.He has to find a new home, but Yuichi was completely blown away by being able to live alone with his aunt Nanao, who secretly admired him.Her yearning for Nanao grows day by day, and even though she knows it's wrong, she uses Nanao's used underwear as a side dish every day to console herself.One day, Nanao finds him masturbating as usual.