The Shadow Keeper Saga

Sixteen-year-old Hanako Izumi commits a crime and is accused of being, or being associated with, a demon, earning him a trial in court to decide whether or not he is allowed to continue living in Bluegate any longer. When a mysterious man that calls himself Ironmage comes out of nowhere and tells him that his life is in danger, Hanako has no choice but to go along with it. After learning the truth about what he really is, Hanako realizes he is going to have to chase, run from, fight, and even team up with demons in order to survive.