Set after Equestria Girls 3 (Spoilers ahead)

After the events of the Friendship Games, Sunset Shimmer and her new friend, Twilight Sparkle try to move on, but the pestering questions remained. What did Sunset turn into? Is Twilight safe from a demonic relapse? How did time loops keep Princess Twilight from responding?

With all three under one roof, the two Equestrians try to get to the bottom of this little mystery. Will they get at least a few answers?

Meanwhile, a new human has set their sights on Canterlot High

Sunset Shimmer still doesn't fully understand how the magic that transforms her and her friends works. She's close to figuring it out though, or so she thought. When a magical "fluke" occurs during a band practice, will the girls, along with the Twilight of their world, be able to figure out what happened, and will they be able to fix it?

Takes place about a week or two after the Friendship Games

This is my first story, so it might be good, it might crash and burn. I am ready for criticism, and prepared for the worst. If you see any spelling or grammatical errors please let me know in the comments.
This idea came from reading Oops! I'm Equine Again by MythrilMoth!
Featured on December 22, 2015! Holy smokes!
Featured again on September 24, 2016! All aboard the hype train!

Sunset Shimmer has had a long day. Intending to relax and blow off some steam, she has an eventful encounter with a recent diary entry from somepony she didn't expect.

This story now has an audio reading!

Sunset has had the same jacket ever since she came to Canterlot High. Rarity and the girls want to treat her to some new clothes, but some things are too important to be replaced.

Starswirl was the last unicorn to have studied the magic of other worlds. That was over a millenia ago, and still no one had even thought of using magic in another world. At least, no one until Sunset crossed the portal. Disobeying her teacher, she had taken magic to the new world, and found it altered. After being reformed, she tried to understand the world's native magic, but failed. She found it was different. Perhaps she just needed a focal point, and what better focal point than Equestrian magic?

However, not long after the primary test, Sunset discovers that one of her friend’s pasts has been altered, and all memory of them erased. Only she notices anything is wrong and has enough knowledge of both worlds to save her friends.

Now history requires an Editor, and Sunset will have to step up if she is to save her friends.

Edited by Scrambled Crackers and Chicago Ted
Cover art stolen from by TonyFleecs

While hanging out with her friends, Sunset Shimmer learns that earth horses apparently can't vomit.

As a magical talking pony, this discovery utterly baffles her.

Proofread by the ever helpful RQK

While relaxing after a performance, the Rainbooms discover Sunset has scars that she definitely didn't have before the Fall Formal.

As of 9/14/2015, this story has a dramatic reading by Goombasa. Give it a listen!

7/7/2016: Now with cover art designed by the very generous Novel-Idea! Thank you so much!

7/23/2016: This story has a reading by Gabriel C Media. Give it a listen!

Ever since she was a filly, Nightmare Night has been Sunset Shimmer's favorite holiday. After all, who doesn't love dressing up and getting free candy?

When Twilight reveals that she's never gone trick-or-treating, Sunset decides that she needs to prove once and for all how absolutely amazing the holiday can be—even if it means she has to drag Twilight along kicking and screaming.

Requested by Not_A_Hat.
Thanks to Oroboro for helping me brainstorm.
Thanks to Oroboro, Frog Myre, Pegasus Mesa, Foehn, Not_A_Hat, and Titanium Dragon, and Pascoite for prereading various parts of this story.

It has been a week since the Friendship Games, and Twilight Sparkle has been settling into her new position at Canterlot High School.

However, there's something off with the bookish girl.

Twilight had planned to visit Sunset Shimmer and her friends over in the other world for a nice, quiet weekend, away from all the worries and problems associated with being a Princess of Equestria. Unfortunately, things rarely go as planned.

After an accident cuts her off from Equestria, Twilight finds herself stuck in the human world until the gateway between the two worlds can be fixed. Which wouldn't normally be a problem...

...If she wasn't still a pony.

Now with TvTropes page!

Cover art
Proofread by Dusty Old Qrow, RQK, Dusty Tomes (Ch. 2), Emtu, and Doctor Candor.