Author's Note

Note: This Sunset isn't the same one as in the Total Changeling Domination story, mine is from an alternate Pony Dimension with similar Uptight issues.

It Begins

Sunset Shimmer sighed in frustration as she looked at the blank book in front of her. This was the third straight week her friend Twilight Sparkle in Equestria had failed to return her messages, sent through the magic book from the same land. It was so sudden, this silence from beyond the world of humans Sunset called home. Sunset was worried, to say the least, since last she'd been told everything was peaceful in Equestria, if anything they'd grown dull.

With a worried look the fiery haired young woman closed the book and set it back in her bag before standing from her desk to stretch. She looked in her full length mirror, studying her human form. She was average height, with a lithe build. Her light amber skin was free of blemishes, and her crimson and yellow hair shined brilliantly even in the dim lights. Her Cyan eyes looked into those of her reflections before a yawn overtook her.

Checking her clock Sunset groaned as she realized she'd been up past ten o' clock. Deciding she'd try again tomorrow she quickly changed into her pj's and climbs into her bed, bundling into her blankets and quickly fell into a deep slumber. While sleep came easily enough, Sunset found her dreams gave little comfort.

In her dreams she was plagued by the events of the last year. Her actions that lead to her transformation into a She-Demon, The Dazzings and The Battle of The Bands, The Friendship Games, and most recently the events at Camp Everfree. All through the night she was shown the darkness of Equstrian magic, the portal to Equestria opening once again, and finally creatures she'd only read about: Changelings.

Sunset awoke to to sound of her alarm clock in a cold sweat. Rubbing her eyes she quickly got ready for the day, deciding to wear a White t-shirt and jeans with her usual leather jacket and matching boots. After a quick breakfast Sunset headed off to school, her usual walking partners Rarity and Applejack waiting at the first stop sign.

"Mornin' Sunset." Applejack said cheerfully

"Yes, good morning Darling." Rarity chirped.

Sunset was glad most of her friends were morning people. Though this morning she was still troubled by recent events and the lack of communication from Equestria. On the way to school she informed her friends about her dreams and not hearing from Equatria's Twilight. Both Rarity and Applejack shared in her concern but neither could think of an explanation.

The rest of the day went by uneventfully, Sunset still distracted by her troubling thoughts. After school the seven girls met up at their usual hangout at Sugar Cube Corner and were chatting casually among themselves. Sunset barely paid any attention, she was holding the magic book she used to communicate with Equestria's Twilight, when suddenly she felt a light poking at her side. She turned to see the Twilight of this world giving her a worried look.

"Are you okay Sunset? You look like something bad is about to happen." She asked.

Sunset looked at her friends one at a time, each one sharing Twi's look of concern. After a moment to think Sunset came to a realization.

"I have to go back." She said.

"Back where?" Twilight pondered.

"To Equestria. I haven't heard from their Twilight in almost a month and I think that has something to do with my dreams. I have to go their and investigate, and hopefully help get things back to normal their." Sunset explained.

"But you haven't gone back since you went to steal Princess Twilight's crown back in the first movie! Are you sure you can handle going back after all that?" Pinkie asked whilst finishing the elaborate decorating of her treat, that might be a cupcake but at this point could be anything.

The others nodded in agreement. At best Sunset had shown apprehension at the prospect of going back to her homeworld, remaining in the human world as penance for her past transgressions. But this was different, this wasn't for selfish reasons, she was potentially heading into a dangerous situation and all to help her friend.

"I know but now it's different. I'm different. I need to know that Equestria is alright, and if not I need to help stop whatever dark forces are at play. You guys know she'd do the same for us." Sunset spoke with determination.

The other six couldn't argue. They knew Sunset was the more experienced with Equestrian magic, and the only one who could go Equestria without possibly creating too big an imbalance. They spoke their support, trusting their friend to do her best.

Later that night Sunset packed some essentials, clothes, food, some bottles of water, and her book to communicate with the others, having left a page with human Twilight just in case. She locked the front door of her apartment and quickly headed to the school, and the location of the Portal. Meeting her there was of course human world Twilight, who was staying in an unused classroom while her parents made the move closer to CHS.

"I did as you asked and managed to build a makeshift activation device for the portal. Unfortunately it'll only work once from our side so you might not be able to get back for a while." She Explained.

"Good job, I knew I could count on you Twi. Don't worry, I'll be back in no time." Sunset reassured.

With that Twilight stood aside and using her makeshift device, which looked like computer parts with a keyboard that attached to the portal with jumper cables, to activate the portal. The mirror glowed faintly, flickering a bit before brightly glowing. Sunset gave one last look to her friend before jumping through.

Sunset was surrounded by multi colored light for a few moments, feeling like she was falling before she emerged from the other side into a dimly lit room. Once the slight disorientation wore off Sunset was surprised to find that she was still on two legs, though these ended with hooves still, and she still had hands.

'Wait what? This can't be right?' she thought

Turning back to the mirror she found that she was a pony again, but also retained human proportions. She also seemed... Bigger now. Before she was lithe and slim but now her body wasn't as skinny, and her legs looked more defined. She also noticed her hips and bust were a bit more curved as well. What was familiar was Sunsets Unicorn Horn, which she was glad to see.

Turning away from the mirror (which thankfully looked like it had been set up to be reactivated) Sunset surveyed her surroundings. The room looked to be in a cave of some sort, lit by the various glowing crystals along the roof and walls. The light was faint but enough that Sunset could see alright. She decided to investigate incognito and cast a simple night-vision spell, glad that all her time in the human world hadn't dulled her magical abilities.

Exiting the room Sunset walked quietly down the tunnel. The walls had a strange texture, they were smooth and whatever coated them radiated enough heat to be comfortable. Sunset kept a hand on the strap of her duffle bag, as she continued forward. This area of the caves seemed to be infrequently used, as she couldn't hear anything living down there.

Eventually Sunset came to find a fork in the tunnel, one side kept going straight, but the other seemed to spiral up. The spiral path probably lead to whatever lived in the cave, and Sunset heard a faint sound coming from it. With a deep breath Sunset made her way up the spiral.

Whatever built this cave had to be large, as the tunnels were easily three times the size of a normal pony. As Sunset made her way higher the faint sounds were becoming more clear. A blush swept across her cheeks as she realized the sounds were... Mares, clearly enjoying whatever was being done to them.

Finally Sunset found a break in the spiral, the entrance to another tunnel. Stepping though she found herself in a cave linked to smaller cave. Creeping quietly she approached the closest one, peeking inside to see what exactly was the source of the elated moaning.

Sunset Shimmer gasped and nearly screamed as she saw what was taking place. Inside the smaller cave were a pair of mares, on on her back and the other bend over on all fours, and both were being... Rutted by large black insect like creatures. Changelings! Sunset realized as she quickly stepped away and moved to the spiral again. In the other rooms, for lack of a better term, the interior was similar: Mares being taken by Changeling males, in all manner of positions, Sunset even recognized a few much to her horror.

She saw the now fully grown CMC all on their hands and knees, being fucked from behind by changeling drones, their flat tummies bulging from the size of their lovers. In another alcove she saw her human world friends counterparts: Pinkie Pie and Fluttershy all being gang-banged by several drones. Pinkie was covered in sticky cum while Fluttershy's tight pussy was leaking copiously. In another alcove she saw a pale white Changeling and Rainbow Dash lazily making love. Sunset backed away as a voice rang out above the sounds of sex.

"Sunset Shimmer!!! What're you doing here!?!" A voice called out from across the cave.

The fiery maned unicorn turned to face her inquisitor and was shocked to see Princess Twilight, naked as the day she was born, her stomach swollen ever so slightly, and a gold collar around her neck. The Alicorn princess was beautiful of course, with a flawless figure and just the right amount of curves, but something about seeing her friend in the nude made Sunset feel uneasy.

"What am I doing here? What in Celestia's name is going on Twilight!?! I haven't heard from you in nearly a month, and now I find you in a CHANGELING hive, butt naked? Explain that!" Sunset said, the upset clear in her voice.

"It's a long story, but I'd LOVE to explain it to you." Another voice called out.

Behind Twilight was another figure. A female, Changeling Queen if Sunset had to guess, who was easily six and a half almost seven feet tall, dwarfing Twilight and Sunset quite a bit. She was naked as well, her figure invitingly proportioned, but what shocked Sunset the most was the impossibly long member swinging between the Queens legs.

"Queen Chrysalis! P-Please give me a moment to talk to Sunset, she'll see our side I promise!" Twilight begged.

Chrysalis merely chuckled as two Changeling Drones emerged from the entrance of the tunnel. Sunset was quickly being boxed in, and even if she teleported back to the mirror there was no guaranteeing she could open it before she was caught and brainwashed into being another slave.

Sunset looked at Twilight one more time, wishing she could get her friend out of there, before focusing her magic into her horn and in a brilliant flash disappeared from the hive. Twilight sank a little, she couldn't go against herQueen, but part of her wanted to find her friend and explain the situation. Chrysalis sent drones to find this new mare and bring her into the fold, clearly this Sunset Shimmer was powerful.

Elsewhere in Equestria a lone figure in a black cloak observed from a far hill as a group of stallions made their way down a path near The Badlands, pulling a currently empty cart. There were three, a Pegasus, a Unicorn, and an Earth Pony pulling the cart. The Pegasus was scouting ahead when he spotted a flash in the distance. The Figure quickly sprang into action, sliding down the side of the hill and sprinting toward where the flash came from.