Standing at the easternmost edge of the Ruvilan Plain, one can see the towering mountains standing like a wall before them. The ancient Ruvilian people generally considered these snow-capped peaks to be the edge of the world. The legendary poems of the Samoyed people praising their ancient emperors depict a lush paradise behind the mountains and indeed, Earth's satellites have discovered numerous green valleys and basins nestled among the crisscrossing mountains of Zarab.

Just as Nox was once an unknown realm where Earthlings harbored their fantasies, now that the land itself has lost its mystery, the paradise nestled in the Zarab mountains has once again become a source of many fantasies. In walentia, there is a rather influential "charitable organization" called the "Adventists", who insist that the "Guardians of Earth and Nox", appointed by the "Cosmic Federation" which rules over thousands of planets and tens of thousands of spaceships, are hidden in Zarab, secretly protecting both worlds. Any Ruvilian knight with a modicum of common sense would probably laugh their heads off upon hearing this: they know perfectly well that Zarab is still in a tribal state, and the only thing they can boast about is wine made from locally grown grapes.