Shinobu is suddenly restrained by a group of men and, with no way to repay the debt, is helplessly turned into their toy. Saying that simply raping her would be boring, their leader Kurokawa begins working on her virgin ass. Day after day, Shinobu is humiliated by brutal anal training unlike anything she has experienced before. Before she can even process her despair, Kurokawa forces his hard cock into her stretched-open ass. Shinobu screams in agony as she is penetrated anally for the first time—but then another man appears...