I Am A Hero follows Hideo Suzuki, a struggling manga assistant in his mid-30s who feels like a failure in life. When a mysterious zombie-like infection spreads across Japan, Hideo must use his hunting license and survival instincts to navigate the apocalypse. Unlike typical zombie stories, the infected retain fragments of their former selves, performing bizarre, repetitive actions that reflect their past obsessions. Readers enjoy the series for its realistic, gritty approach to the collapse of society, the deeply flawed yet relatable protagonist, and the tense, unpredictable horror balanced with dark humor.