This story is a sequel to Daughter of the moon

This is a Prequel of my story, Daughter of the moon. https://www.fimfiction.net/story/518899/daughter-of-the-moon

Tension between the Royal Alicorn Sisters rises, neither understanding the others true intentions. They aren't, however, the only siblings that represent the Night and day.

Luna and her young student, Selena Pulsar.
Celestia and her young student, Sunset Shimmer.

But will the royal sisters relationship affect their students sisterly bond in the same way?

Will the new king of the crystal empire help or make things worse.