Sun and Moon

According to story from long ago, there once was a place where the suns lived. Every century, the ruler of the suns (who sheds light on the human world) will pass away, and a child borned on that day would be the new ruler.

Lately, the previous ruler had just passed away, but shockingly enough, there were two children born on that day. People see this as an evil omen, and measures would have to be taken.

Out of the 2 children, they took the one that had been given birth first, and send the other child to the moon, a place forbidden for any suns to enter so that the child would live a miserable life.

The new ruler, a young girl, was given all the care and attention she wanted, living the life of a princess. The only thing denied of her was a room with a mysterious mirror. Out of curiosity, the young ruler ventured into the room one day and saw the other child that was abandoned on the other side of the mirror. When the attendants come in, the young ruler's only question was: "Who is she?"