At least 1,000 years have passed since the legend emerged, and the human race has taken root in every continent and developed a sinister history of war. Expanding their living space and strength in numbers, they ruined the surrounding woodlands, while mountains and rivers began to expel the mobs who inhabited many populated regions.

Mob is the definition of the huge variety of monsters that live in every part of the old Mir continent. Different from the common beast, mobs are fearful animals that have developed special abilities simply to survive. Mobs began raiding the human strongholds in an attempt to overrun their habitat but their sporadic attacks failed to threaten the sophisticated lifestyle of humans, who were now systematically organized and armed with the various skills of war. The mobs were massacred, so many moved to remote places, largely away from human contact, while the rest remained to live in places where they could not be found.

Humans continuously expanded their territory to the benefit largely of themselves, regardless of all others. Often they have developed cities only to fully expend its power and resources. As scarcity and resources dwindled, wars broke out between various human factions. In the vortex of these wars and warring parties the continent was unified into three big countries, dominated by three cities: Hagan, Jebaek, Seoho.

These three countries were separated only by a subtle balance of power, so they sought every chance to weaken their opponents' power and influence using intrigue and trickery. This allowed one country to attempt to strengthen its power while waiting for an opportunity to expand its realm.