The young man Daisuke, who came to Tokyo with a heavy snort for the university entrance exam, was allowed to stay at Minori's aunt's house in Tokyo for about a week. On the first day of his stay, Daisuke casually opens the bedroom door and witnesses his aunt getting dressed to go out somewhere. Daisuke thought it was bad and tried to leave in a panic, but he was glued to the naked body of his 42-year-old aunt, who had the body of a teenager, shaking before his eyes...!
