Parasyte

Parasyte is a Japanese manga series written and illustrated by Hitoshi Iwaaki. The Manga series was adapted into anime and several live-action movies. The story of Parasyte follows Shinichi Izumi who gets infected with a parasitic organism that wanted to take over his brain. Instead of merging with Shinichi’s brain, the parasyte landed on his arm. The organism and Shinichi Izumi need to learn how to cohabitate together or destroy each other.