ao no exorcist and D. Grayman

Ao no Exorcist is very similar in storyline to D. Grayman. The main protagonist is a young boy named Okumura. He however is cursed with being the illegitimate son of Satan. He then is rescued along with his twin brother by a society of exorcists. A priest, who Okumura calls father raises him, in hopes that he Okumura will use his powers for good, and not evil. After Okumura's foster father is killed, he pledges himself to train to be an exorcist, and defeat Satan's forces. In D. Grayman the main protagonist is Allen Walker, who is becomes cursed after he turns his dead relative, and father figure into an akuma, by being tricked by the evil Earl. However Allen's relative instead of killing Allen fights the urge, and then curses him. Allen then leaves after destroying his relative to then be found by General Cross, an exorcist of the Black Order. Allen then after a time of apprenticeship goes to the Black Order to be trained and become a full fledged exorcist. So if you like Ao no Exorcist then you will love D. Grayman.