A strict uncle takes in his niece Luna, who has repeatedly engaged in illicit sexual relations with the opposite sex and has become a slut, in order to correct her disorderly lifestyle... However, he is fixated on her loose panties! As the niece gradually starts to show them off, the uncle becomes aroused and has sex with her, cumming inside her! The uncle, who has lost his inhibitions, becomes a virile man and goes crazy! The slutty niece can't stand the intense pistoning and cums over and over again! The choice of panties, which was carefully crafted down to the smallest detail, and the temptation of the devilish Luna's panties are very exciting!