I recommend "He Comes From the Depths of Time", a young school novel. The female protagonist is the butler of the male protagonist, while the male protagonist is a black-bellied wolf. However, the female protagonist is also extremely smart and omnipotent. When she faced various challenges, she was always able to solve them successfully in her unique way. If you want to read a butler novel with an invincible female lead, then this book will definitely not disappoint you! I hope you like this fairy's recommendation. Muah ~😗