Spending the holidays with your girlfriend's parents is never easy.

Especially when they think you’re a magical gangster hell-bent on corrupting their daughter.

A Valentine's Day fic... sorta.

Pre-read by Themaskedferret. Thanks to FloydienSlip for help with the title.
Cover art by little-tweenframes.

Time passes...

Hearts change...

Bonds that once seemed unbreakable become distant memories.

For Sunset Shimmer, the glorious years of her youth have long passed. She's put down roots, and built a life for herself at Canterlot High. The bustle and excitement of yesteryear becomes replaced with the peace and tranquility of routine.

All that changes when the past comes back to visit...

Special thanks to SolidFire for his editing work.
An entry for the Changing Seasons contest

Professor Twilight Sparkle has spent her adult life trying to forget the follies of her youth, and the fiery sorceress whose betrayal shattered her heart.

Sunset Shimmer has built an empire of steel and science in memory of the otherworldly power she once wielded, and of the soft-spoken scientist she once called "friend."

Now, fifteen years after the disaster which tore their bonds asunder, a new threat will force these two former friends to reunite in order to save both worlds. And as the past collides with the present, Sunset and Twilight will learn that even in a world without magic, friendship and love still have the power to do the impossible.

Set after Legend of Everfree. Later Equestria Girls stories aren't necessarily canon to this timeline.

Pre-read by ChudoJogurt.

Cover art by Kare Valgon.

(2018-25-04) Featured on Equestria Daily!

Story has been written and will update weekly until completion.

This story is a sequel to Tactics of Snowbound Unicorns

Harmonic bonds aren't the most predictable of spells. Sunset learned this the hard way with Twilight. Involving Moon Dancer will make things either extremely complicated, or extremely simple.

And that has nothing to do with harmonic bonds.

Knowledge of the previous stories set in the Wavelengths Timeline is suggested, but not required.

Cast: Sunset Shimmer, Twilight Sparkle, Moon Dancer & Princess Celestia
Co-Starring: Coco Pommel, Coloratura, Minuette, Cheerilee and Raven with a special appearance by Philomena as herself.

Historian’s Note:
Set in the Wavelengths Timeline where the Sonic Rainboom didn’t happen, A Study on Chaos Theory occurs about two months after The Cloudsdale Report and three weeks after Tactics of Snowbound Unicorns.

Stories set in the Wavelengths Timeline in chronological order:

Origins Arc
The Alchemy of Chemistry
Bards of the Badlands
Grading on a Bell Curve
Habits of the Equestrian Phoenix
How Not To Use Your Royal Prerogative

Applications Arc
The Application of Unified Harmony Magics
Princess Celestia: A Brief History
The Cloudsdale Report

Dreamers Arc
Tactics of Snowbound Unicorns
A Study in Chaos Theory
Teahouses of Saddle Arabia
As the Raven Flies

Cover Art by OverlordNeon
Cover Text, Chapter Header and Break Designs by Amber Spark
Sunset Shimmer Cutie Mark by MillennialDan
Celestia’s Cutie Mark by BlackGryp0n
MLP Book Vector by SnowedEarth
MLP Magic Aura Vector by AimeeLovesU
Moon Dancer Cutie Mark by AllyCatBlu

Beta Reader & Editor Credits
Little Tinker: Master of Systems at Poniverse & Scripting Engineer on The Manehattan Project
Beltorn: Commenter-at-Large on FimFiction
Cursori: Reader of Many a Pony Word
JayMan155: Artist & Author Extraordiane!
Corejo: Synopsis Combo Finisher

Word Count: 45,000
Version: 3.1

Princess Celestia has something to tell Sunset Shimmer.

Something about her parents.

It's nothing strange at all.

Yep.

Rated Teen and Sex for a very brief mention of how babies are made.

A lone vampire bat sneaks through the mirror portal and ends up in the human world. Instead of apples, it now craves something far richer. And unfortunately for Sunset Shimmer, she's its next snack.

Sunset can't remember any of her activities past sundown. The light hurts not just her eyes, but burns her skin. And she's thirsty.

So very thirsty.

It's up to the Rainbooms to save Sunset from herself before she drinks the whole city dry. Too bad Twilight Sparkle is her primary target.

Thanks to Saro0fd3monz for the inspiration!

Edited by DrakeyC and HenryAnthonyCourtler

Now with a TVTropes page!

Now with a French translation!

It turns out that Sunset Shimmer's final letters to Princess Celestia before her exile were not filled with resentment or remorse.

There might have been a lot more frantic running away involved.

But whatever the case, it was definitely not Sunset's fault.

At all.

Cover Art designed by Novel-Idea from my original cruddy screencap!

Rated Teen and Sex for mentions of egregious sexual irresponsibility. No actual sex.

Contains minor Sunlight shipping. Much apologies.

Sunset Shimmer has always been a hot-headed, impetuous girl. She's always been prone to making snap decisions, and later finding herself regretting them. It was exactly this temperament that had brought her to the human world, penniless and alone. When the opportunity to get back on her feet presented itself in the form of a stranger's outstretched hand, she leaped at the chance.

This is the story of a woman who has made many bad choices, and the life those choices have made for her.

Tags, and even rating, may change as the story goes on.

Thanks as usual to Magello for the cover art!

Co-written with Professor Piggy. Rarity and Applejack go out for a fun night on the town with their friends, but when Rarity's flirtatious tendencies flare up, the evening rapidly turns into something more serious than either of them expected it to be. A RariJack story.

It's Starlight Glimmer's first Nightmare Night in Ponyville, and she invites Trixie to go to a Haunted House attraction with her. As it turns out, Trixie is very very easily frightened. Almost too easily. Certainly it's not some silly excuse for the sideshow magician to cling to her very best friend... right?