In the distant past of Munto when the world of the Heavens did not exist, humans lived a prosperous civilization. One day, beings of unknown origins fell out of the sky and onto human world. These beings could control a power called Akuto, or human emotions. They could take the human spirit, which is an accretion of feelings, wishes and dreams and turn that into a physical power or physical object. These beings, obsessed with their powers, destroyed the human civilization within a few days. However, they did not realize that the humans created the Akuto; these beings who descended from the skies killed off the very source of their power. They then discovered several alternate universes which they could draw more Akuto from. They depleted all the other dimensions of Akuto and used it to create their own empire in the skies above the humans. This new civilization was known as the Heavens and was populated by the Heavenly Beings who could control Akuto.

The leaders of the Heavens soon grew corrupt due to the unlimited amount of Akuto they had stolen from other planets in other space times, and the Heavens began to collapse into disarray. At this time, the humans launched an attack against the Heavens. They were the very humans that were defeated when the Heavenly Beings first showed up. The humans who supplied the Akuto then defeated the Heavenly Beings. During the battle, the leaders of the Heavens decided to sever the supply of Akuto, cutting themselves away from Earth rather than be killed by the rebelling humans. They sealed themselves into a parallel dimension in order to sever the link of Akuto, though this resulted in the pillars that connected Earth to the Heavens to fall from the sky causing massive destruction. This day was called the "Calamitous Day" when both worlds lost contact with each other. From that day on, the Heavenly Beings considered linking the two dimensions together to be a taboo and appointed a guardian to guard this link to make sure it is never connected again.

In the present day, the Heavens are in disarray due to the lack of Akuto flowing into the Heavens. The Heavens, divided into kingdoms, battle each other. The Magical Kingdom is blamed for using the Akuto the most and the other kingdoms seek to destroy the Magical Kingdom in hopes of preserving what little is left of the Akuto. Should the Heavens be destroyed due to a lack of Akuto, the floating islands in the sky will fall to the Earth and the Heavens and human civilization will perish. The Magical Kingdom is led by their king Munto who believes the only way to save the Heavens from destruction is to seek out Yumemi Hidaka who holds the key to restoring the Akuto to the Heavens.