Uchimura and his companions have overcome a series of dangerous challenges to free Kuryuu from the grip of an evil tyrant, stop an impending Calamity, and achieve their ultimate goal of rescuing Ulmandra. However, any hope of downtime upon their return to the Demon Kingdom is short-lived. The Holy King of Starfrost warns them of multiple Calamities occurring simultaneously and calls for an alliance to confront these threats. Tasked with spearheading this effort, Uchimura is dispatched to the Sylvania Empire...only to find himself unexpectedly surrounded by heavily armed individuals?! This merger promises to be quite the tall order!