Parasyte

One night, mysterious parasites fall from the sky and burrow into human hosts, seizing their brains and turning them into predators that feed on people. The one sent for Shinichi Izumi fails, settling into his right hand instead. Forced into an uneasy partnership with the cold, curious creature he calls Migi, Shinichi must fight other parasites while slowly changing himself. Gruesome, thoughtful and gripping, this seinen classic questions what it truly means to be human.