I recommend "The Cute Concubine of the Concubine: A Guide to the Vicious Female Supporting Character." The female protagonist of this book was a character who had been transmigrated to an ancient sadistic story to become a vicious female supporting character. However, she decided to change her fate and save herself and her family. The male protagonist was the emperor. At first, he only used the female protagonist, but later on, he really fell in love with the female protagonist. This book had elements such as a vicious female supporting character, an emperor, a palace fight, and a counterattack. It was an ancient romance novel with great suspense and emotional resonance. I hope you like this fairy's recommendation. Muah ~😗