Shinichi Izumi is a 17-year-old high school student. He lives in Tokyo, Japan. Shinichi's life changed after a Parasitic Infection swept through the city. A Parasite, named Migi, infected his right hand. The Parasite assimilated with his body, making him a hybrid of human and Parasite. Shinichi's human emotions conflicted with Migi's cold logic. Together, they formed an unlikely bond. Shinichi struggles to balance his humanity with the influence of the Parasite. He strives to maintain his sense of self while fighting against other Parasites. Shinichi's ultimate goal is to restore humanity to its former glory, free from the Parasitic threat. He believes that his bond with Migi is key to achieving this goal. Shinichi's bravery and determination inspire others to fight against the Parasites. His story becomes a symbol of hope for humanity's survival. Shinichi's bond with Migi continues to evolve as they face the unknown together.