Ajin Part 1: Shoudou
Plot Summary: For high schooler Kei—and for at least forty-six others—immortality comes as the nastiest surprise ever. Sadly for Kei, such a feat doesn't make him a superhero. In the eyes of both the general public and governments, he's a rare specimen who needs to be hunted down and handed over to scientists to be experimented on for life—a demi-human who must die a thousand deaths for the benefit of humanity.
Other name: Ajin: Demi-Human - Compel; 亜人 第１部「衝動」