I recommend 'Keeping Slaves Is a Disaster, Your Majesty, I Want Love' to you. In this fantasy romance novel, the female protagonist, Jin Tong, was gentle and kind. When she had red eyes, she was cynical and bloodthirsty, but she only protected the male protagonist. At first, the male protagonist did not like the female protagonist and only used her. In the end, he fell in love with her because of the female protagonist's sincerity. I hope you like this fairy's recommendation. Muah ~π