“I will repay every yen my husband borrowed.” When a criminal debt collector comes to the hospital where her husband is staying, devoted wife Saki is offered a lucrative job at an underground casino. Her beauty and body are supposed to earn quick money, but she is dressed in a humiliating, nearly nude uniform that leaves her breasts exposed and made to entertain wealthy clients. The demands escalate into sexual service, trapping the big-titted wife in debt, degradation and servitude as the casino's dedicated sex slave.