Charlotte picked up her pace, anxious not to lose sight of Kaspar in the distance. Putting that smartass bitch back in her place should make me feel a little better, she told herself, with a vindictive smile.

It had been an awful couple of months. Charlotte Glass had been the undisputed queen of her high school for as long as anyone could remember. Smarter and more beautiful than any of her classmates, she had the boys wrapped around her finger, not to mention all her teachers, who saw her as a golden girl who could do no wrong. The girls respected and feared her in equal measure, with those she’d gathered around her into her personal entourage unswervingly loyal to her, and the others living in terror of her scathing, self-esteem-crushing remarks. Even as she approached graduation, her reign over the student body remained unassailable.

But now her popularity seemed to be crumbling around her ears, thanks to a series of lewd photos that had been making the rounds on social media. She’d protested time and again to anyone who would listen that she’d never taken nude selfies, and that they were obvious fakes, but few people would listen. It didn’t help that more of the fraudulent images were appearing all the time. Many of her close friends - or acolytes, to be more accurate - had deserted her, her boyfriend Nathaniel had asked for some time apart, and it was taking all her effort to keep her parents from finding out. The whole situation wasn’t helping her focus on her schoolwork - though she’d consistently had among the highest grades of her year, she was suffering academically now. Whenever she tried to study, she just couldn’t concentrate - her head felt like it was full of cotton wool. Must be the stress.

For the first time in her life, she felt defeated. She couldn’t see a way to put an end to the scandal. She desperately needed a win. Which was why she made the rash decision to follow Kaspar home after school today.

Kaspar Davies was at least as smart as Charlotte - more so, even - but in all other respects, they couldn’t be more different. Where Charlotte was slight and blonde with heaving breasts, Kaspar was tall, flat-chested and ungainly with short brown hair, clearly uncomfortable in her own skin. While Charlotte was an outgoing and quick-witted conversationalist, Kaspar had always struggled socially and largely kept herself to herself. The taller girl’s lack of confidence and physical grace had always made her an easy target for the popular blonde’s snide put-downs, and Charlotte had made an example of her in front of their classmates many times, as far back as the fourth grade. Even her name gave Charlotte an opening - what girl was called ‘Kaspar’, for God’s sake? The only chances Kaspar had ever had to gain some small ground against her longtime tormenter had been academically - the taller girl usually got higher grades than Charlotte. But even then, this enabled Charlotte to make hypocritical fun of her and deride her as a nerd and a bookworm.

Ever since Charlotte’s reputation had floundered, though, Kaspar seemed to have changed. She had a new spring in her step, a surge of confidence that, Charlotte assumed, must be because she knew her lifelong antagonist had lost her position of power. It was almost as if they’d had a sudden reversal of fortune.

Well, Charlotte was intent on taking Kaspar down a peg, and demonstrating that she was just as powerful, just as fearsome as ever. She’d meant to deride and humiliate Kaspar during the school day, but her voice had faltered at the last moment, as she had a brief flash of panic imagining the student body siding with her victim over her - an insane idea, but given recent events, a worryingly plausible one. But as the day ended, Charlotte decided to follow Kaspar home and torment her in the streets instead.

She quickened her step again as she turned a corner, beginning to catch up with the towering figure in the distance. There was no-one else in sight - it was just the two of them. Now was the perfect time.

She thought she’d been walking quietly so as not to alert her target, but Kaspar suddenly slowed to a halt and turned to face her, wearing a disdainful smirk. That alone was an act of defiance Charlotte could not abide. Her face flushing with anger, she opened her mouth to speak, a particularly vitriolic opening line on the tip of her tongue.

But Kaspar spoke before she could. “Well, hello there, Lottie,” she cooed, as if talking to a pet or a small child.

And something in Charlotte’s brain went pop.

Falling to her knees on the sidewalk, she gazed up at Kaspar with wide eyes. “Mistress!” she exclaimed, overjoyed.

Stepping towards her, Kaspar reached out and patted her on the head. “There’s my good girl,” she purred, as Lottie mewled delightedly and nuzzled against her hand. “Do you want to come home with me, sweetie?”

“Yes, Miss,” Lottie said eagerly. Planting her palms on the hard ground, she began to crawl forwards.

Kaspar spluttered with laughter. “No, no, you stupid bimbo! When you’re outside, you walk upright on your two legs, like me.”

“Oh!” Lottie sprang to her feet, giggling. “I’m sorry Miss, I forgot. I’m so dumb!”

“Yes, you are,” Kaspar chuckled, putting her arm around Lottie’s waist. The blonde girl writhed happily in her grip as they started to walk together. “But that’s what I like most about you.”

***

Once they reached Kaspar’s bedroom, she had Lottie hand over her phone. “Yes, Miss,” Lottie said meekly. “All my stuff is really yours. I’m too stupid to own things.”

“That’s right! Good girl,” Kaspar told her, knowing that Lottie would completely miss the layer of mockery over her praise. She quickly unlocked her erstwhile tormenter’s phone and opened the camera app. “Now, you know what to do, my slutty little slave.”

Beaming, Lottie began to slowly strip off her clothes and cast them aside carelessly, making sure to pose in a variety of provocatively sexual ways as she did so. Kaspar snapped photo after photo of her, messaging them to her own phone and uploading the most lewd online. Though they’d been posted anonymously, she had no doubt that they’d come to the attention of their classmates, just as the others had.

Soon, Lottie stood completely naked before Kaspar, proudly arching her back to show off her D-cup boobs. Grinning, Kaspar groped them eagerly, rolling her nipples between finger and thumb. Lottie whimpered and leaned forwards, pressing herself further into her Mistress’ grasp.

Releasing her, Kaspar went and sat in the revolving leather chair in front of her desk. “Be a happy puppy for me, Lottie,” she commanded.

“Arf!” Lottie cried, dropping onto all fours. Her tongue hanging out, she gazed across the room at Kaspar. Grabbing a rubber band ball from her desk, Kaspar threw it across the room. With an excited yap, Lottie charged after it, picking it up in her mouth, and then scrambled over to her Mistress, who took it from her and rubbed the puppy-girl’s head and the back of her neck, sending waves of pleasure through her that made her whimper loudly.

Kaspar played fetch with her pet girl a few more times, throwing the ball across her bedroom and letting her retrieve it. Finally, she replaced the now drool-covered ball on her desk. “Be a good puppy, Lottie, and pile up your clothes in the corner.”

“Ruff! Ruff!” Lottie scampered over to her discarded garments and began to pick them up in her mouth one by one and carry them over to the corner of the room. This tidying process took longer than it perhaps should, as she was so deep into the canine act that she instinctively played with whatever item of clothing she picked up, whipping her head back and forth while gripping them tightly between her teeth.

“Not the panties,” Kaspar told Lottie, who was nuzzling the flimsy underwear with her nose. “Bring them to me.”

Lottie obeyed, and Kaspar balled up her trophy in her hand and dropped it on the swivel chair as she stood up. Walking over to her closet, she opened the door. “Be a person again, Lottie.”

“Yes, Mistress,” Lottie panted, getting back to her feet. She stood meekly, her head bowed and her hands behind her back, waiting for further commands.

Kaspar sifted through the outfits in her closet. Her own style of dress was not exactly elaborate - she wore T-shirts and jeans on a daily basis, and kept them in a chest of drawers. The closet was for her smarter clothes, of which she owned few, and she had recently filled the extra space with costumes for Lottie, one of which she took out now and held up in front of the short blonde. “I think the maid outfit today,” she decided, gesturing for Lottie to take it from her.

“Yes, Miss,” Lottie said eagerly.

Within minutes, she was kitted out in a black-and-white lacy dress with a little white apron over the skirt, which was so short it covered almost nothing. A pair of tall pink high heels and a white hairband completed the look. No-one seeing her would mistake her costume for any serious form of maidservant’s uniform - this was a slutty maid, without a doubt.

But that didn’t mean Kaspar didn’t intend to put her to work. “Tidy my room, maidservant,” she ordered.

“Yes, Miss!” Lottie set to work immediately.

As Kaspar admired her slave - periodically taking more photos of her in her costume, making sure to get her exposed butt cheeks in frame - she gleefully let herself recall how her former bully had become her submissive slut. She’d spent years studying the art of hypnosis, learning how to put someone into trance, even against their will and without their awareness. She’d done so with a single objective in mind - revenge against Charlotte Glass, the vicious little bitch who’d made her life a total nightmare for almost nine years.

Kaspar had practiced her burgeoning talents on friends and family, never with any malicious intent (the most she ever did was pull little pranks on them that only she knew about, like having her younger brother change his shirt three times in an hour without realising). She’d even managed to mesmerise her history teacher, which enabled her to put the next part of her plan into action and compel Ms. Clark to pair her with Charlotte for a project. Her nemesis had begrudgingly accompanied her to her home one evening to discuss their work, and soon fell victim to her hypnotic skills.

Over the course of several months, Kaspar cultivated a series of triggers and suggestions that led to the formation of ‘Lottie’, the submissive, slutty alter-ego whose entire mentality and perspective was the inverse of Charlotte. Lottie adored Kaspar and would obey anything she told her without hesitation. Where Charlotte was admittedly intelligent (although not as much as Kaspar), Lottie was a smiling moron, her brain devoid of any thoughts that didn’t revolve around her Miss. And through Lottie, Kaspar could shape Charlotte’s mind even more easily. Charlotte didn’t even remember being paired up with Kaspar for the history project any more. She certainly wasn’t aware that the lewd selfies were indeed taken by her - or rather, by her secret hypnotist.

Kaspar’s Moms both worked long hours, so they were often absent in the evenings. On such nights, Kaspar would send Charlotte a text simply reading ‘Breadcrumbs’. Charlotte wouldn’t remember the message, but it would subconsciously compel her to follow Kaspar home that evening, thinking she was going to take out her anger and frustration over the recent scandal on her longtime target - only to become Lottie the instant the two girls were face to face. This scene had played out dozens of times, and always ended the same way, with Charlotte returning home unaware of anything that had taken place, even forgetting her decision to pursue Kaspar in the first place. As far as she was concerned, she’d spent the evening with one of her asshole friends.

Kaspar returned her attention to the present, as she watched Lottie scoop up discarded socks and candy wrappers from the floor. “This is all you’re good for, you brainless whore,” she laughed. “Just serving and obeying me, because I’m smart and you’re not. You know you’re just a stupid fuck doll, don’t you, Lottie?”

“Yes, Miss,” Lottie replied, smiling broadly. Her warped mind interpreted any abusive words or actions from Kaspar as a sign of her affection. The crueller Kaspar was, the happier it made Lottie.

Her tidying done, Lottie stood before her Mistress, who walked around her, admiring her from all angles. Kaspar pinched her hypnotised plaything’s nipples through her dress. She spanked her ass. She slapped her face. She held her mouth open and stuffed her balled-up panties inside. “Bimbo sex toys like you don’t need to talk,” she told her, pushing her mouth shut. Lottie nodded eagerly, eyes wide, not daring to part her lips even a fraction of an inch.

At Kaspar’s command, Lottie lay back on her bed, posing in her maid outfit with her legs spread, one hand tracing fingertips through her cleavage, the other reaching under her skirt. Taking yet another picture as she sat on the other end of the bed, Kaspar had Lottie lift her skirt, exposing her bare pussy - another photo opportunity. Then she produced a light blue dildo and handed it to Lottie, who slid it inside herself as soon as she was permitted to.

This time, Kaspar took a video. She had Lottie recite a short script she’d prepared beforehand, after first taking the panties from her mouth. “I’m a stupid little cum dumpster,” Lottie mewled, as she moved the dildo back and forth, side to side inside her cunt. “Please watch me while you jerk off...”

Laughing maliciously, Kaspar uploaded the footage online. Photos could be faked, which was Charlotte’s last crumb of deniability for the lewd shots, but it would be harder to exonerate herself of a video.

With that done, she reached out and grabbed the dildo, taking over control of its motion. Her ruthless thrusting soon brought Lottie right to the edge of orgasm - but no further. “You don’t get to cum,” she reminded her hypnotised plaything. “Your pleasure doesn’t matter. Only my enjoyment matters. I’m gonna use you and then leave you frustrated, you useless little slut.”

Lottie gasped joyously, eyes lit up like all her birthdays had come at once.

True to her word, Kaspar soon withdrew one sex toy from inside another. Pulling down her own pants, she beckoned to her slave. Lottie crawled forwards eagerly and thrust her face between her Mistress’ legs, eager to give her the ecstatic release she herself had been denied.

***

Some time later, Lottie was ready to be sent on her way, having changed back into her own clothes. (Except her saliva-drenched panties, which Kaspar threw in the trash.)

“It’s time to play the pretending game again, Lottie,” Kaspar told her, smirking. “You’ve been doing such a good job playing this game, my good little bimbo!”

Lottie blushed. “Thank you, Miss! I pretended so hard, I thought I actually was Charlotte...”

“Perfect,” Kaspar said, struggling to keep a straight face. “And remember, Charlotte won’t know she was ever here. She’ll think she was at one of her friends’ houses.”

“Yes, Miss,” Lottie said brightly.

“And as always, you’ll stop pretending to be Charlotte when you and I are alone together and I call you by your true name. And when Charlotte has to use her brain, she’ll really struggle - because, of course, you’re a brainless little bimbo!”

Lottie giggled. “Yes, Miss!”

Kaspar gave the mesmerised blonde a few more instructions for how to behave while she ‘pretends’ to be Charlotte, and then sent her on her way. By the time Lottie reached her house, she was Charlotte again, all memory of the evening she spent with her nemesis erased from her conscious mind.

That night Kaspar went to sleep smiling, her mind filled with memories of how she’d degraded her lifelong bully - and vividly envisioning how much worse Charlotte would suffer in the coming days, thanks to the video already circulating through social media, and the utterly humiliating new trigger she’d been given at the night’s end...