Please recommend a completed novel with the male protagonist being a human and the female protagonist being a ghost.

I recommend the novel Ghost Chef to you. Although the genre of this novel is not exactly the same as what you described (urban-supernatural), the plot of the male protagonist being a human and the female protagonist being a ghost meets your requirements. In addition, this novel has been completed, so you don't have to wait for updates. I hope you like this fairy's recommendation. Muah ~😗