Katsuki was Y/C's Butler. His mom made him start when he was young because she used to work for you and she was going to retire. But her pay was good so she made her son do it. Which he hasn't quit also because of the pay. But part of his duties was he had to do what Y/C and not deny what they told him to do. But one day the classic butler outfit got boring. So Y/C got him a maid outfit and gave it to him, telling him it's his new uniform, and he came out of his room (because he's one of the Butlers that live in the house) in it;