Many years ago, a young boy named Robin became a demon after he signed a contract with the evil Millennium Earl in order to revive his dead sister. Now having been sealed by his master, Robin is working as an exorcist to rid the world of all demons. One day, while on a mission to locate his master, Robin passes out in front of a restaurant where he meets Rinali, a young girl whose fiancé died three years ago. But when Rinali makes a contract with the Millennium Earl herself, it’s up to Robin to save her, no matter the cost to himself.
I have not (yet) read any portion of D. Gray Man, so I have no idea if this is telling the same story or if it's just riffing on the same idea or something. But on the plus side, I guess that let's me judge this story purely on its own merits. Okay, so this is a world of demons and exorcists. It seems that demons are the byproduct of a deceased soul being merged with or "wearing" a living person. The Millennium Earl preys upon grieving people to get them to sign a contract and unwittingly go through this process of becoming demons. Our main character, Robin, is a demon who is able to keep his demonic nature at bay because of his exorcist master's seal. Yes, we have a demon who is exorcising other demons. I'm not sure how I feel about the whole Final Boss set-up with the Millennium Earl. It creates a clear trajectory to the story (track the Earl down, defeating demons along the way), but I'm not sure if the Earl is an interesting enough character to maintain my interest as a long-term villain. Honestly, I'm not even sure if Robin is an interesting enough protagonist to maintain my interest. But for this single chapter, they're alright.
Eh, it's ok you can definitely tell it's a pilot of the serialized manga. Too short, and seems like it comes in part of the way during the "journey", yes i use the quotes way too much. ~SPOILERS~ Not really much just Robin exercising a girls dead fiance which is actually a doll the will become an Akuma and lead/help to destroy the world. 49 pages of one story line. The end. Only read if you are a 100% for all manga/D.Gray-Man.