You have entered Equestria via a black portal. To make matters worse, the portal's properties have made your body able to cast magic spells, much like a unicorn. To ensure that you can be able to control these powers, Celestia assigned you to be Twilight's student.

What a great decision she had made. Throughout your time with her, you developed feelings for your teacher. One night, you ask to sleepover at her house. This night would be the night that would change your relationship to her forever as she tests your willpower.

Image by Mewball.

'To whoever gets this message, we're in desperate need of help.'

'Equestria...Equestria is on the brink of being destroyed. Sombra, Tirek and many other villains are taking over our world. The Ambassadors of Harmony are nowhere to be found and Celestia and Luna...Faust, Celestia and Luna. I don't know who you are and I don't care, just as long as you can save us. And if you can't do that, then at the very least...'

'Avenge us.'