D.Gray-man is a Japanese manga series written and illustrated by Katsura Hoshino. Towards the end of the 19th century, Allen Walker joins the organization of Exorcists that destroy the beings known as Akuma; mechanic weapons made with the suffering souls of the dead. Allen, along with his fellow Exorcists must put a stop to the Millennium Earl's ultimate plot that could lead to the destruction of the world. The books were previously adapted into a 103-episode anime series that aired in Japan.