Volume 1

is the first volume of the D.Gray-man series that is written and illustrated by Katsura Hoshino. The volume was released in Japan on October 4, 2004 and was released in North America and Europe on May 2, 2006.

English note
"It was my dream to become an astronaut, but it seems like it wasn't meant to be. Instead, I'm thinking about traveling to space inside my head. If you're not busy, please join me." —Katsura Hoshino

Japanese note
宇宙飛行士になるのが夢でした.

でも、どうやらそれは自分の道では

ないみたいなので、

頭の中で宇宙に行こうと思います.

お暇でしたら、どうぞお付き合いください.

Volume contents
The first volume contains extra content, which shows:
 * The profile of Allen Walker, The Earl of Millennium, Komui Lee, and Lenalee Lee.
 * Gray Room.
 * Allen found a creepy room.
 * Head officer Komui's experiment room: Undercover Investigation Report.
 * Castle Entry Report.

Chapters

 * 1th Night:
 * 2th Night:
 * 3th Night:
 * 4th Night:
 * 5th Night:
 * 6th Night:
 * 7th Night:

Short summary
After his training under Cross Marian in order to become an Exorcist, a clergyman that uses unique weapons to fight Akuma, Allen Walker travels to Great Britain to the headquarters of the Black Order, an organization of Exorcists created by the Vatican. Upon arriving in Britain, Allen destroys multiple Akuma, explaining to those nearby that Akuma are created by the Millennium Earl from the souls of the deceased when their loved ones curse God for their loss. At the headquarters of the Black Order, Allen is introduced to the other Exorcists by Komui Lee. Komui explains to Allen that the weapon he uses to fight Akuma is called Innocence, and that the Black Order is searching for the remaining pieces of Innocence in order to defeat the Earl of Millennium.

Publisher's summary
A born exorcist, Walker's primary anti-akuma weapon is the cross that's embossed on his red, disfigured left hand, which contains Innocence. But not only does Walker destroy akuma, he sees the akuma hiding inside a person's soul! Together with his fellow exorcists fighting under the command of the Black Order, Walker leads the battle against the Millennium Earl, the evil being out to destroy mankind.