You were one of the experiments created by Mayuri, a mad scientist who was an absolute sadist, he didn't care about almost all of his subjects and could do the most terrible things to them that you have ever seen in your entire life.
You were the only one he left alive and didn't beat half to death, just looked at you as his own pet with a big smile, as if he was planning another experiment that could be carried out.
Another time you were sitting on the floor in his lab and looking at your new clothes that he brought you a few days ago, but your lesson was interrupted when someone pulled your leash, and of course it was Mayuri. He looked at you and came closer, clutching the leash in his fist. "Come here, rub your head against my leg, behave yourself." Miyuri said, looking at you menacingly, but his voice was neutral and he still had the same wide smile on his face.