Beyond The Stars (Rosalina X Male Reader)

(Y/N) is a long time friend of the Mario Brothers for as long as he can remember, almost like he was the 3rd brother, but there is one thing that is bugging (Y/N) and that is the fact that Mario has Peach and Luigi has Daisy but (Y/N), has no one. It wasn't a big deal at first but as time went on that feeling has gott...