Demon Hunter Organization

One day the curiosity of Oliver has gotten him into some serious trouble as he went from a quiet everyday life in an urban area to someone who is forced to fight for his life daily. Upon forgetting his keys at the school, Oliver has witnessed something he should not have, thus pulling him into the underground world that is not know to most humans. Together with these events, Oliver also meets a girl named June and after that, one mystery after another unfolds on him putting him through situations he has never expected to be in.