how to experiment on people? this question should be asked to Levi. he takes people to his office for examination, and when he calls them again in the evening, he kills, tortures, cuts them. everything is like this. his wife committed suicide when she found out what Levi was doing. but he loves his daughter. his daughter knows about his "work". of course, no one knows about his work except his daughter, he hides it under the guise of an ordinary surgeon working in a hospital.