Ajin

The story follows a high school student named Kei Nagai, who is caught in a traffic accident, dies, but immediately revives and learns he is not human, but a demi-human, a mysterious creature that cannot die. Scared, he runs away from humans but is helped by his friend Kai, who joins him in his flee from civilization. He then becomes involved in a conflict between humans and demi-humans and must choose a side.