<b>An Endless Hell of Pleasure and Ecstasy!</b> Forced to pay off their debt with their bodies, the relentless assault begins in this hardcore story...! One day, a person named Saki-san appears before the Shimaino sisters. His job is to train girls who can't repay their debts and sell them as toys to customers...!! Determined to protect her younger sister, the elder sister Hana resolves to work for both of them. She tries to withstand the training, vowing that her spirit will not break. But gradually, the man's massive organ begins to plant seeds of pleasure in her...!?