In a confinement room located beneath a luxurious mansion, sex slaves Akari and Arisu are held captive. Yumika, who has just welcomed a new master, is ordered to explain the rules. To repay their debts, a special game devised by the master begins. The rules are as follows: first, catching the master's sperm inside the vagina earns 3,000 points; second, achieving orgasm adds 1,000 points. However, if faking an orgasm is detected, all accumulated points are immediately nullified under strict penalty. Under these bizarre conditions, the troubled women expose their lives as flesh slaves, launching a new, intense drama.