Parasyte (寄生獣/ Kiseijū, lit. “Parasitic Beasts” is a science fiction horror manga series written and illustrated by Hitoshi Iwaaki, and published in Kodansha’s Afternoon magazine from 1988 to 1995. The manga is being adapted into two live-action films in Japan in 2014 and 2015. An anime television series adaptation by Madhouse, titled Parasyte -the maxim- (寄生獣 セイの格率 Kiseijū Sei no Kakuritsu), aired in Japan between October 2014 and March 2015.
Shinichi Izumi is a normal high school boy whose right hand has become infected with an alien parasite that names itself “Migi” (“right”. Migi is the first parasite to develop a symbiotic relationship with its host, as he and Shinichi slowly develop a grudging friendship. Migi isn’t the only Parasite on earth, however, and as cases of Parasites killing humans begin to emerge, humans seek to kill off Parasites. Shinichi and Migi find themselves caught in between these two sides of the struggle over planet earth.