Several thousand years before Sora and Shiro got to Disboard and the legend known to everyone began, there was another legend - forgotten by everyone. This is a story about a great war that lasted from time immemorial, about how the scorched earth was fertilized by blood, and ash fell from the crimson skies without stopping. About how weak and helpless people were, who did not even hope for happiness and were simply trying to survive, so that at least their descendants would someday see something other than this war. And about a man and a girl who decided to put an end to it and challenged the whole world, deciding to consider what was happening as just a game.

Is this story true or not? Is it really that important?