The back training diary of "Aoi" who has been trained for 3 months by the back customs organization "NEO BLACK". Aoi, who is brainwashed, "Please use it as a meat urinal as you like." It is licked with the whole body lip and it is intensely deep throated and cum swallowing as a matter of course. Aoi who was brainwashed by eroticism is not satisfied even if she is blamed with various toys, and in the end she is killed by devil men.