The book I recommend to you is " Wear It to the End of the World ". This is an ancient romance novel about the female protagonist transmigrating into a man. Although he was a little silly as a man, he was a powerful princess. He was surrounded by nine beautiful concubines and a fairy like princess. Perhaps it was a little unusual, but it was interesting and exciting. Moreover, there were many exciting plots between the male and female leads. I believe you will like this novel. I hope you like my recommendation.