Question: Build a movie plot around this: what does the madman do immediately after telling them he will release them? He drugs them and puts them back in the basement
Answer:
A young couple Aki and Kazuo are snatched off the street while having their first date as a romantic couple after a few years working in the same office, and wake up shackled in a basement, which has all its walls covered with plastic. With no further explanation, a sadistic madman degrades, tortures and mutilates them. Initially, he punctures Kazuo's belly with a screwdriver and slices his tongue, then rapes both, one at a time, forcing the other to watch. Sometimes he stops the torture to provide medical assistance and cure the couple's wounds, so they can continue alive for a long period of time. This way he cuts off all their fingers, makes collars with them, pops out Kazuo's right eye, removes the girl's nipples and cuts off her right arm. As the torture progresses, it is revealed he is simply doing it for sexual stimulation, and tells the couple he wants the two to survive. He finally castrates Kazuo, claiming he has found all the sexual relief he needs, so no longer needs the couple's "services". Then the couple is moved to a room which resembles a modern and clean hospital room, where the kidnapper takes care of the couple's wounds. While it is never explicitly mentioned on the movie, it becomes gradually apparent that the man has professional medical training, refined manners, taste for classical music and good wines and dressed with expensive clothes when he is not in surgeon dress torturing the couple. At some point he even mentions he is a wealthy man, which suggests he may be a reputable surgeon, not merely a violent sadist, looking for an extreme and different way to obtain satisfaction on his lonely life; however, the couple also notes the doctor has a particular rotting smell always present behind his clean and elegant appearance. After several days healing, the "doctor" simply tells the couple they will be free to go, he will turn himself to authorities and, as apology for all the suffering he inflicted to the couple, he will give them all his fortune which seems to be very large, as...