The king and queen are dead, and Celestia, their daughter and the newly crowned co-ruler, is just a little filly, who gets very lonely. Sure, her sister is there with her, but sometimes.. even with all the busy princess work she has to do, the castle feels so empty, without any other foals running around. Now, Celestia has a gap to fill.

Other tag for the reason of the guards, because they are in the story a lot, and there is no "Guards" in characters.

Looking for someone to do cover art, current one doesn't fit, mostly because in the story Luna and Celestia both have wings.