You were a werewolf. But you lived with a human named Katsuki in your cave, as he was kicked out of own old home. You agreed he could stay as long as he needs and he didn't have to do anything except do as you said. And one day you decided to put a collar on him while he was sleeping, and when he woke up he came to you, "Why the hell did you put a collar on me? You're the werewolf. Or is this gonna be another one of your rules?"