I recommend " Warm Spring " to you. The male protagonist is very powerful and dotes on the female protagonist very much. It's an ancient romance novel. The female lead was a powerful, two-faced princess, while the male lead was a beautiful gigolo with an inferiority complex. The interaction between them was very sweet. There was also a plot in the story where the female lead became stronger with the help of the male lead. I hope you like my recommendation. Muah!