6 decades books

Nier wakes up with a burning hole in his stomach and three questions:Didn’t I just die? Why does my best friend, Elir, have wings? And why are my comrades slaughtering their own families?Just hours earlier, Nier was a soldier in the Fratian Army’s 2nd Squad—the last standing nation’s defense against the Lights, once worshipped as gods’ soldiers.Born a Light descendant himself, Nier only wanted to prove that not all of his kind were monsters.His best friend, Elir—known as the Killer Child—only wanted to protect him.Both failed in their first mission, which ended in disaster: Nier died, and Elir transformed into a full Light, shattering a hundred years of peace.