Chronos – Deep

The world is split in two, the light and shadow. Now the shadows can posses humans, creatures of the light by feeding off of their life. However Some who don’t lose themselves, are trying to fight back.
From Fallen Syndicate:
Since the death of his family in a mysterious fire, Nanasawa Io has lived as an outcast. Students at his school fear him and animals around him soon begin poping up dead. This brings about an investigation into Io by a group know as the Titans. The Titans goal is to hunt down and destroy Kagetsuki- people who have become possessed by malicious shadows. However, what the Titans soon discover about Io isn’t what they expected.