Nue's Exorcist
Gakuro Yajima has seen spirits ever since he was a child, yet he stays timid around them after one killed his father. At his high school he discovers a sealed room and meets Nue, a powerful spirit who has waited sixty years for someone who can see her. She forms a contract with him, granting exorcist powers so they can fight evil entities born from negative emotions. Written and illustrated by Kouta Kawae. Japanese manga. Ongoing.
Read Nue's Exorcist manga in English, updated regularly. Also known as: 鵺の陰陽師 · Nue no Onmyōji