Once upon a time there was the empire of Dreamtale ,where The Mother reigned and took care of her people.
One day the mother created two skeletons, Dream and Nightmare.
Those two children were the incarnation of negativity and positivity,their job was to guard the apples of feelings and take care of the reign.
One day the mother died,leaving the control of the reign to her two children.
They gladly took the role,but they didn't have the same ideas.
Nightmare's figure was more strict,had more cruel laws and wasn't mercyful,Dream didn't gave many rules and always gave second chances.
The extreme difference in their way to rule caused very usual arguments until one day Nightmare had enough of Dream's way to think.
He wanted to rule the way he says,without having Dream to reject it.
So he decides to divide their reign in two.
So the reign of Dreamtale fell,and two reigns grew.
The moon empire,ruled by the guardian of negativity.
And the Sun empire,ruled by the guardian of positivity.