Zombie no Afureta Sekai de Ore dake ga Osowarenai

Takemura, an antisocial former office worker, has his life changed in an instant when the world suddenly becomes infested with zombies. Somehow, he's the only one that doesn't get attacked by them. "Helping others? Forget it. I'm going to live in this world freely." In this apocalyptic world, Takemura has gained immense power. Living while hiding the fact that zombies won't attack him, is he a hero or something else entirely...?