Twilight, in the midst of a number of growing feelings that revolve around a certain pink mare, finds herself having to share her home with the object of her affections when a rainstorm hits Ponyville.
As an ancient alicorn trapped inside a library, Princess Twilight spent many a century dreaming of being rescued from her prison. Now, finding herself in an entirely new Equestria, she realizes she'd never planned for somepony to actually succeed...
Rarity enjoyed the simple pleasures of life. Drinking tea, fighting timberwolves, picnics with Fluttershy, meeting dragons and, most of all, spending time with an ancient alicorn spirit. She wouldn't give it up for anything in the world.
When one fateful search through the Everfree Forest leads Rarity to a secret library inhabited by the spirit of an ancient alicorn princess, she realises that it may be time to start believing in fairy tales.
An accident with the Mirror Portal ends up with Twilight stuck as a small pony in the Equestra Girls' world. Her friends can't get over how cute she is.