Years ago, a sea of fire engulfed the once generous forest of Bielefeld. The soldiers and citizens worked together to extinguish the fire. However, the hot flame continuously spread, crawling slowly, pounding every greenery with its nonexistent feet. The rain had poured but did nothing. The kingdom of Bielefeld was forcibly thrown into chaos. The blue flame laughed at its victims like a hideous villain. And, the one behind the tragedy smirked, as if it already had won the battle. Little did it know about the existence of the kingdom's 13 knights?