Read manhua Magic Emperor
Since ancient times, the demon emperor has risen above all and therefore his title was inherited. Once he died because of the betrayal of a loved one. Having revived, he lost his strength, but with him remained his inner demon, which dragged him into trouble. He withdrew into himself. He had to become the personal butler of the eldest daughter of one important family. Passing the way from the demon emperor to the butler, how can he now get along with the Lady and the demon inside him? How can he lead a dying clan? How will they return together to the top of this world?!