Sakasama no Babel

A man named Rye searches for remnants of his missing father in the ruins of a city on the brink of destruction. As the world faces annihilation by God, a massive "first class" appears far from the ruined city. Humanity's survival depends on overcoming it with a white pair of wings and a dark halo. Rye and his master, who uses artificial limbs, set out to confront the tower in hopes of reaching the Gods.