The underground city, a barren land where not a single blade of grass grows.
This is a vast space composed of rocks and gravel, all in shades of reddish-brown.
Flying sand pervades the desolate land.
The murky air also expands throughout the space.
In this world that is clearly untouched by man, where people would never be found on any ordinary day, a war has erupted.
"Roar!"
"Roar!"
Accompanied by intimidating roars, a group of monsters with footsteps heavy enough to cause the ground to tremble charged forward like a stampeding herd of beasts, kicking up sandstorms as they launched their assault.
The monsters, with two twisted horns like those of a goat's, swollen necks topped with ugly, horse-like faces, easily stood taller than a grown adult. Their muscular bodies, brandishing clubs that resembled fossilized skeletons, made them look like wild men of grotesque appearance.
