Note: Based on the Dead Like Me universe, but takes place in the Naruto-verse. This is not a crossover; knowledge of Dead Like Me isn't necessary at all; this fic just borrows the concept of reapers. It's assumed that Hidan eventually died in the ditch(...which, canon-wise, did happen, I think?).
For reference: reapers are the randomly selected souls of the dead forced to stay behind on earth and collect recently deceased souls until they fulfill an unspecified quota. They do not choose who dies, nor do they actually kill the victim, and they receive their assignments on post-it notes through their group leader. They have a physical body with the same needs as the living and have no special powers, aside from quick healing and the ability to go unnoticed during a reaping.
Gravelings: "Gravelings are mischievous gremlin-like creatures that cause the accidents and mishaps that kill people. The living generally cannot see them... Reapers can see and interact with them to some extent... Gravelings do not communicate verbally with Reapers, and talk to each other in a hushed and unintelligible babble."
All other details will be explained throughout the fic.