Many years ago, the sun and moon were strangely hanging together in the sky, with no distinction between day and night for more than a month. The fusion of twin radiances swept across the entire land with the power to destroy the world. The blazing flames burned the vegetation, and the biting cold air froze the mountains and rivers. Fully 80% of the living creatures on the earth were completely annihilated in this disaster.
And a large part of the creatures that were lucky enough to survive also experienced strange changes in this "sun and moon shine together"...
