Parasyte is a Japanese manga series created by Hitoshi Iwaaki, first serialized in 1988. The story follows a high school student named Shinichi Izumi, who becomes partially infected by a parasitic alien that takes over his right hand. This alien, named Migi, has its own consciousness and abilities, leading to a unique partnership as they navigate threats from other parasites that consume human hosts. The series explores themes of identity, humanity, and survival, as Shinichi struggles with his dual existence. As he confronts various parasites, he learns about the nature of life and the moral dilemmas that arise from coexistence with these alien beings.