Behind-the-scenes training diary of "Aoi" after undergoing three months of intense conditioning at the underground sex organization "NEOBLACK." Completely brainwashed by the words "use my body as a flesh toilet however you like," she gradually becomes enslaved, desiring pleasure from the cruel men who torment and play with her. Her entire body is licked and ravaged with relentless deep throating, yet she endures with a desperate craving to be filled. Even when tortured with various sex toys, her corrupted mind remains unsatisfied. Ultimately, she is repeatedly violated by the merciless men, descending into utter depravity.