Thousands of years passed by, humankind appeared. They exploited the floating islands, learned to live harmoniously with Mongens on the land, and made these creatures assist them to settle down. Human and Mongens joined efforts to exploit the land, expand the territory, enrich the living resources via farming, breeding, producing, and entering the battle with other lands to win the booty. The Mongens race has started a new life with humanity's assistance. But deep down, they still have a longing for their homeland to be merged someday!