I Tamed the True Heir

Blaine (the fake young master) regains his memories and foresees that Callum (the family's true heir), whom he is currently bullying, will in the future take away the entire family fortune and destroy him. To protect himself, Blaine decides to take control of the situation and deliberately humiliates and tames Callum: ordering him to tie his shoelaces, deliver milk every day, come whenever called, and even demanding that he bark like a dog.