The three sisters, struggling to make ends meet because of the debts their father left behind, decide to use their bodies to earn money as a private delivery health service and take on customers on their own... The eldest sister, Yui, has plenty of sexual experience. She licks the nipples of the masochistic man and makes him ejaculate with pleasure in the cowgirl position! The second sister, with her plump naked body, heals the customer's Kokoro and penis with a big-assed cowgirl position, and the devilish third sister gently guides the virgin penis and takes his virginity in a spider cowgirl position! If the three of them join forces... they can milk every last drop of semen from the debt collector with a group of sluts...!