"Netherworld Ninety-Nine Cities... that parallel world's apocalyptic battlefield?" The faces of the first team leader and the fourth team leader both took on a peculiar expression.
It was a world extremely similar to the real world.
However, the greatest divergence had begun several years prior in that world when powerful armies of a different race suddenly invaded.
War spread across the whole world, and humanity was initially suppressed.
In the end, the human nations exhausted their last bit of strength to construct high walls around ninety-nine large cities scattered around the globe.
Only then did they barely manage to preserve the seed of humanity and engage in a protracted tug-of-war with the invading armies of different races.
And it was the human players who joined the battle to support the human side.
Because the world was extremely similar, there were many players who could even find their parallel universe selves in that world.
