Mayumi, alone and horny, retreats to her room, fingers her pussy through her panties, then strips naked. She spreads her legs, exposing her glistening cunt, and rubs her clit, moaning softly. Suddenly, a knock at the door - her roommate's home early. Flustered, Mayumi tries to hide, but not before her roommate catches a glimpse of her soaking pussy. Embarrassed but aroused, Mayumi continues, inviting her roommate to join in her private pleasure.