Parasyte -the maxim- - S01

They came without warning: parasitic aliens that descended on Earth and quickly infiltrated humanity by burrowing into the brains of vulnerable targets. These insatiable beings take full control of their host and can morph into a variety of forms in order to feed on unsuspecting prey. Sixteen-year-old high school student Shinichi Izumi falls victim to one of these parasites, but it fails to take over his brain and ends up in his right hand instead. Unable to relocate, the parasite, now named Migi, has no choice but to rely on Shinichi to stay alive. So the pair are forced into an uneasy coexistence and must defend themselves from hostile parasites that hope to wipe out this new threat to their species.