About

High schooler Shinichi Izumi and you are attacked by living organisms!? Parasites normally take over a human's brain... One attacked Shinichi but failed to seize his brain, instead parasitizing his right arm. The parasite in his right hand calls itself "Migi." Shinichi and you build a strange coexistence with it. Together with Shinichi and Migi, you will end up fighting against these parasitic organisms.