I recommend you the novel,"Female Supporting Character Turns Over: The Prince Regent's Favorite"! Different from the female lead, the female lead, Lin Qingqian, had transmigrated to become a vicious supporting actress. However, she had decided to redeem her original self's mistake. She protected the male lead, Gu Changgeng, in every way possible, hoping that he would become the regent with immense power and let her go. There was also the male lead's brother and a complicated palace battle plot, which made people unable to put it down. I hope you like this fairy's recommendation. Muah ~😗