Joe/Billy, Billy/various both m and f. I assume if you’re reading this rec, you know the movie, but be warned there are spoilers in this rec (as well as, obviously, in the story itself).
Maybe it’s because I started out in HP fandom, where ghosts are characters too, but I really adore afterlife fic. This story begins with Joe’s death - how Billy deals with it, and how Joe deals with it. And neither of them deal with it very well. But then Joe’s shade starts haunting Billy, so to speak, and things start to change. I won’t say too much about how they change, because the slow build of the story to the eventual realization and climax is so artfully done that I don’t want to spoil it. I’ll just say that the author is very clever, and everything fits together beautifully and logically.
The story is structured beautifully, with clever choices of repetition and variation. Each scene contributes something, and the bits wrap in on themselves perfectly. One of my particular favorites is the scene with Bucky Haight; another is the scene just before that, with Ashley’s dad. Finally, there’s a lot of very hot sex throughout, but none of it feels gratuitous. It’s all there for a reason, and the reason becomes clear as the story builds to, er, the climax.