Fantasy, I Am a Domineering Tyrant!

The time-traveling villain is a domineering tyrant who fights for dynasty hegemony and controls the harem as he pleases. The sixth prince of the dynasty traveled through time, and turned out to be a stand-in. He awakened the overlord system. Starting from a frivolous princess, he embarked on the path of an unscrupulous and arbitrary tyrant. Newbie, new book, please give me some advice, that's all. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.