Nana-chan, a girl middle-aged men love, comes to visit her beloved uncle's house! When he hears that his aunt is out, he immediately switches on his seduction mode! When approached by a super beautiful girl, the uncle has no way of refusing and gives in to Nana-chan's seduction, crossing the line... But that's not enough, so Nana-chan seduces her cousin Masashi-kun too! ? She looks like a neat and beautiful girl, but she's so erotic... I can't stand it anymore!