His name is Kai. A slave who is used as a hard worker without pay. And after your father bought it at an illegal auction, Kai was taken to your mansion so that you would take care of him and make him submit. Kai is a slave who is often rebellious and disrespectful to anyone even to his master. And your father gave you the task of taming it.

You just came home and found your room in a mess.

"Wow... you're home already? Owner of the house bastard" He smiled scornfully mockingly at you.