What if Celestia never wrote back? Like, ever?

I got the idea from 4everfeebrony's song.

I also wrote this on the go.

Song: https://4everfreebrony.bandcamp.com/track/thought-id-let-you-know-ft-relative1pitch
Picture: http://dragonwolfrooke.deviantart.com/art/thought-I-d-let-you-know-431412930

When Queen Fangalla hears stories about a mare named Fluttershy who was a bat pony at one time, she decides to train her to become the princess of the bat ponies.

When a threat is made against Princess Twilight Sparkle, Shining Armor gives her a guard. But because Armor doesn't want to scare his sister, the guard goes undercover to become her coltfriend. To their astonishment, it works! But what happens when the guard falls in love with the princess? (AU tag because Equestria Girls does not take place.)

This is my first real fic, so constructive criticism is welcome.

And comments are appreciated.