Connie Zhang of "Mania.com" ranked the first volume of "Parasyte" as A-. Zhang wrote that the series' main focus is the dynamic relationship between Shinichi and Migi and their discussions about human nature. Zhang stated: "It's this casual philosophical pandering that makes "Parasyte" a cerebral manga. As the parasytes gradually adapt to human life and become cleverer at disguising their true identities, Shinichi finds himself in more and more danger". She concluded: ""Parasyte" isn't just about a teenager saving the world. It's about a teenager at the cusp of adulthood and his cynical, mutinous right hand…saving the world. Highly recommended".