/r/Parasyte

They arrived in silence and darkness, descending from the skies with a hunger for human flesh. Parasytes - alien creatures who must invade and take control of a human host to survive - have come to earth. No one knows the secret except high school student, Shinichi Izumi, who's right hand has been invaded by a Parasyte. Shinichi and Migi, the Parasyte, begrudgingly form a friendship in the middle of a silent war between humanity and the Parasytes.