She broke the great rule that has been followed for a long time. Sage was one of the siblings of a deity and a human. His parents were so in-loved with each other, they didn't care about the taboo that'll cause them.
His parents were part of four dukedom houses. They are the moon that supports a successful empire. Even though they are called the moon, the light within them was brighter. The mother, who is a deity, hides her real identity.
At that time, the deities who were part of the holiness, once a god's friend, weren't accepted in the human realm. They were still against each other. Though the rule forbade this kind of relationship, the deity saw a pure innocent heart within the man. He accepted her, but she is hiding beyond the shadows and continuously fooling the world.
