Luna is on her way to visit Celestia, but hears her squealing for someone to 'stop!'

She walks in on Twilight on top of a red-faced Celestia, and the two of them react like guilty teenagers. Just what the buck is going on here?!

When Twilight visits Celestia's private hall of stained-glass windows, each bearing the image of a long-gone friend, one in particular catches her eye.

Who was this pony?

Why was she so important to Celestia?

And why does she look so familiar?

There is now a Spanish translation of this story, courtesy of Spaniard Kiwi

Twilight looked over to her dear mentor, Princess Celestia, and found she had once again fallen asleep mid-lesson. Her intense debate on awakening the princess was cut short when the decision was taken out of her hooves.

“Huh? Oh. Twilight, I am so sorry for falling asleep again. I think we need to reschedule this for tomorrow morning.”

Twilight nodded. After all, Princess Celestia was obviously overworked. If only there was something she could do to help.

Now with a dramatic reading courtesy of DRWolf.
Additionally, there’s a Spanish translation by Spaniard Kiwi over on Deviant Art.

Current Episode: Season Zero – Episode One
Next Episode: Twin Twilights

Art created from images by Tim015 and ShilaDaLioness.

Some accidents are small, and some endow you with the power of a godly ruler. On the opposite end of things, you lose your wings along with your ability to move celestial bodies, and you can't tell anypony. Why, because what would they think if the princess became a librarian? It's going to be "fine". Celestia just needs to switch back with Twilight before either of their true identities are revealed. All Twilight has to do is hold down the castle, fight off scheming villains, run the country, and worst of all... deal with all the noble ponies.

Rated teen for shenanigans and some more serious parts. Takes place at the end of lesson zero. Please tear this apart with comments. I like criticism. Comment if you have issues, don't leave me with a mystery thumbs down.

Twilight gets a distressing letter from Celestia and rushes to Canterlot.
What happened to the princess? What is Luna up to? Why do I sound like the narrator to a bad crime drama?
The first chapter is inspired by a drawing from JohnJoseco. The rest will be my own madness doing its part.

What if Twilight was orphaned before her acceptance into Celestia's school for gifted unicorns?
what if she and the princess of the sun became inseparable? What if Twilight starts calling Celestia mommy after their lessons?
What if Celestia loves it?
Inspired by the cover photo

This story is a sequel to Waiting For Perfect

Celestia and Twilight are getting married. It'll be the most wonderful day in either of their lives. If only there weren't all those trials Twilight had to complete... Whoops? Sorry about that, Twi!
Pre reading by Jumbled Thought, Adren, ZOMG and Shiny
Third place winner Seventh bimonthly Twilestia contest Contest

She is just beautiful, so talented, so brilliant. Celestia would give her crown up for a chance to be with a mare like her. But, she can't just ask her out. The timing must be perfect.

Editing done by the brilliant Don't Look At My Name Bro I am seriously lost without you!

Competition fic with The_Weatherbug- Lies of The Pristine

Inspired by Lie

Princess. Alicorn. The pillar of all ponykind, against which so many ponies often judged themselves. Celestia hates having to constantly be these things, and it's past time for a break. Luna will watch over Equestria while her sister is gone, but taking a break from your duties and taking a break from how the world sees you are two very different matters. Enter Prominence, a quiet pony who nopony really pays much mind to. Perhaps because she doesn't exist.

Aided by this disguise, Celestia will find her peace and relaxation in the home of one of the few ponies who know Prominence's true identity: Princess Twilight Sparkle. But when Twilight begins to see Celestia as a pony, and not a princess, can she deal with the feelings that arise? And are the feelings for Celestia, or for a pony she knows is not actually real?

EDIT: I've been featured, July 19th, 2014. I have no words to express how terrified and humbled and terrified and proud and happy and terrified this makes me.

Celestia is struggling to come to terms with her true feelings for Twilight.

Unwilling to watch her sister suffer under apathy and indecision, Luna takes it upon herself to help Celestia confront her newfound feelings.