Requiem of the Apostle

It was neither God nor demon. It was merely a 'will'. In 2015 AD, a massive explosion in Antarctica—Second Impact. Fifteen years later, the sea is red and half the world is dead. Humanity barely survives, only to face a new battle against mysterious monsters called Angels. This is the story of those Angels. The protagonist is the Third Angel, Sachiel. A being with a bone-white body and a bird-like mask. He has no human language. He has no human emotions. Only a pure, desperate longing to 'bec