Toshiya decided to stay at the house of his aunt Shirina, who had been longing for him since he was a child, to attend college. The sex appeal and erotic atmosphere of the beautiful Kanna Arihara becomes irresistible, and she spends her days suppressing her desires by secretly peeking into the bathroom and changing clothes. When Toshiya looks into the place where Kanna Arihara is cleaning the bathroom as usual, there is a figure of Kanna Arihara comforting herself.