Riko, the stepdaughter of her new husband, has recently become much more mature. After her stepfather massages her injured leg during a sex trip, she begins to experience the pleasures of adulthood with aphrodisiac oil. When her mother is out, he gives her a special massage. Eventually, her body becomes so desperate for her stepfather's dick that she can't stand it. Her petite body arches back as she convulses in orgasm! "Stepfather, give me more!" She becomes a pleasure-filled urinal with his inexhaustible sex...