I recommend the book "Ling Ru Yue, Mo Ru Shuang" to you. The male protagonist, Mo Yan, is a black dragon. He met the female protagonist, Mo Ling, in a cave. The female protagonist has the soul of a phoenix. The plot where the male protagonist went to the female protagonist's house to choose his fiancée was also included. I hope you like this fairy's recommendation. Muah ~😗