The Prefects led the firsties from the common room to what they called a playroom. There they were made to sit on the ground, on their knees like demure little maidens, and await until the Dom of the Dorm would make her presence known.

Eventually, she did.

She was relatively short of stature, with long dark hair reaching her lower back, loosely gathered together on a messy braid. Her uniform was pristine. Her panties were bulging with a barely restrained erection. Her breasts were a nice handful, not too big, not too small. All in all she was a pretty, if not exceptionally so, girl, Harri mused.

Harri listened for approximately eight seconds to the opening speech that the high dom of the Slytherin dormitories gave. Only so long as to get her introduction as "Ekaterina Folley, Queen Bitch of Slytherin", and then she lost her patience.

"Hey," she interrupted, "can we go on soon? I want to cuddle."

"Why are you here actually," Ekaterina, really that was a mouthful, stated, more than asked, really.

Harry's hand went to her cock. "I'm here to get this sucked," she said, waving her erection about.

"Arrogant aren't you," the dom said. "Well, might as well ignore the preamble and just get on with it, everyone, pick a firstie and-"

"Actually, that's not gonna happen. See, these fresh, tight, virgin pussies are all mine, and call me selfish, but I don't like to share my toys," Harri said with a smile that was perhaps a little too wide. "So you're not doing that tonight."

"Impudent little-" someone shouted, taking a menacing step forward.

Ekaterina raised one hand. "You think you've got what it takes to come here and tell us, the ruling council of Slytherin, what I can and cannot-"

Harri raised one hand and ran it through her hair, coming back down with a clump of semen. She then threw it into Ekaterina's mouth with unerring, deadly accuracy.

The girl swallowed reflexively, choking slightly on it.

"What the he-"

"Tell you what," Harri said, "I'll stand her and let you, and all your little subby sluts," she said, gesturing to the gathered prefects, "fuck me all at the same time. If you can make me submit, I'll become your cute little sex slave, your personal toilet, whatever you want me to be," she said. "However if you can't do this, I'll turn the tables and fuck each and every one of you to submission, until you're nothing more than a cumslut craving for any and all cocks you can find."

"You- you mongrel, how-"

"Your filthy pussy is worth not-"

"I'll rape your ass for the-"

Harri turned to the prefects. "Or," she said, taking a step forward, "since you can't control your subby little sluts... Let's skip the first step."

The dungeons were big.

Bigger than they could ever be based on the size of Hogwarts. They were home to many, many different kinds of playrooms. This one in particular had very little in the way of equipment, just a very padded rug, and a handful of hooks on the walls. It was circular and wide open. The prefects had stood on one side, near the door, as if to cut off escape, while Ekaterina had been taunting them from the middle, in front of the gathered firsties.

Harri crossed the distance between her and the older girl in a few steps and before she had a chance to really get into that tirade she was going to start, Harri's right hand grabbed her hair and shoved her down.

Caught by surprise, she didn't even have a moment to react. "And a pain slut as well," Harri said, giggling. "I'm gonna love turning you into a nice cum dumpster for public use. Nobody touches my little sissies without permission," Harri said with a nasty grin as she forced the girl down until she was on her knees.

"H-How the hell are you so-"

"I'm not, darling," Harri cooed, "you're just this much of a submissive slut."

The girl blinked. "W-What-" she said, "What are you going to-"

"Shush," Harri interrupted, looking at the prefects. "And you all... I want you to enjoy this show and know that you're next," Harri promised, ending her sentence with a giggle.

"You bi-" Ekaterina began, but her open mouth gave Harri a perfect opening.

Ekaterina choked when her mouth was invaded suddenly, as her head was shoved down and used like a toy Harri was masturbating with. "Mmmh, that's so nice," she said, "for someone so high and mighty," Harri moaned, "you suck dick like-" she groaned and moaned, then let out a low, long moan, "oh, so good, it's been a while since I've had a blowjob this good!"

Harri's other hand came to her head, and she began pumping her hips at the same rate that she was shoving Ekaterina's head down, increasing the speed and force of the thrusts, causing Ekaterina's choking to get worse, spraying spittle all over Harri's crotch.

"Oooh, I'm gonna give you your creamy treat!" Harri shouted, "here I go, don't spill a single drop! I'm cumming!"

And she did, with an almost beastly and throaty moan, Harri exploded, quickly overflowing Ekaterina's mouth and causing it to spill all over the place. Harri noted, absent mindedly, that what splashed on the carpet quickly disappeared.

With a strong shove, Harri tossed Ekaterina to the ground, and she groaned in pain. "F-Fuck yo-"

Harri giggled as she took a step forward and then with a wide and sweeping motion, perhaps overly grand, she brought her hand, open palm, on Ekaterina's covered ass. The crack was muffled by the cloth of her skirt and knickers, but she still screamed at the hit.

As Ekaterina tried to scramble away, she got on all fours for better motion, but Harri wasn't letting up, instead grabbing onto her panties and forcefully ripping them off. Harri giggled when she saw the panties were back to pristine condition just moments after the pieces hit the floor. Magic was just so very fantastic, she mused.

"That's a nice and big arse, mmhm," Harri said, approval on her tone, as she nodded to herself. Ekaterina had frozen upon the pain of getting her panties torn off, but she came back into motion, her arms growing weak, as Harri's hand once more came down on her ass.

"You really didn't think it was over, did you?" Harri said. "You were intending to rape my cute little sissies," she said, a nasty grin on her face, "I will break you for that," she said with a giggle. She then began to beat on Ekaterina's ass with an almost demented and frantic rain of slaps, until she finally stopped after reaching twenty and pulled back, "but this doesn't help if I'm not educating you! Okay, darling, repeat after me: I will never try to put my dick on an unwilling girl ever again!"

"EAT MY ASS YOU STUPID-"

The crack of skin on skin was almost a beautiful sound.

"Tut tut, that's not the answer I was expecting, my cute little piggy," Harri said, before using the hand still on her ass to caress it a little. "I care about you, you know. This is for your own sake, for your future, you can't just go on in life thinking it's okay to just take what you want whenever you want it," she said, humming and nodding to herself, as she approached her butthole.

Ekaterina gasped as she felt Harri begin to caress her asshole directly, before slipping a finger in.

"What's this? Mh... this is one well trained behind! I wonder... has it seen much use? Do you masturbate with your arse, cutie?" Harri asked.

"I- What the-" Ekaterina seemed a bit shocked.

The slapping sound of another spank quickly brought her out of that state.

"Answer the question," Harri said, her tone harsh.

"Y-YES! I DO! I MASTURBATE WITH MY Arse EVERY DAY, STOP HITTING ME YOU FUC-"

Two spanks, this time.

"Watch your language, slut," Harri said. "You masturbate with your butt, mhm," she nodded to herself. "How many cocks have been up here, slut?"

"FUCK-"

Three, this time.

She screamed. "I'm sorry, I'm sorry!" as she saw Harri's hand rear up for a fourth. Despite her pleas, the hand came down, perhaps even harder.

"Don't be sorry, slut, be better," Harri said, as she caressed her ass before leaning in and giving her much abused buttcheeks a soft kiss, one for each. "How many cocks have fucked your pretty little arse?"

"I don't know, I'm sorry, I don't know!" she squealed, "I'm sorry I don't know, I'm sorry-"

Harri kissed her on each cheek before kissing her butthole directly. "That's a good slut, that's a very good slut," she said. "Mhm... do you want me to fuck your pretty little arse too? Would you like that slut?"

"YES! YES PLEASE! I LOVE IT WHEN I GET FUCKED IN THE ASS!" she screamed.

"How much do you like it slut?" Harri asked, smirking to herself.

"I LOVE IT! IT'S MY FAVORITE!" she shouted, a demented grin on her face.

"Do you let your friends fuck you in the ass slut?" Harri asked.

"NEVER! I'm so sad! I LOVE IT SO MUCH!" she shouted, "I love it I love love love it! I love getting stuffed with big cocks, sometimes two or three at a time, on my ass! But I can never do it here!" she ranted, "I can never just let myself go, whenever I see my girls all I can think about is how big and thick and delicious all those cocks look, and how I would love to have all of them give me a big fat dicking, I want their cum on my ass, in my ass, I want it all over me, I want to be woken up every morning by someone fucking my ass, I want to be passed around, I want my ass to be used as a cocksleeve, I love it love it love it!"

Harri blinked and almost took a step back. "Oh my, you were holding back THAT much, slut?"

"YES! This feels so good! I always had to keep appearances, I hated it! I'm a Folley so I have to be commanding, I have to stand for the honor of my house, I can't be a subby little slut like I've always wanted to be! Thank you mistress, thank you for beating my stupid little delusions out of me, this is where I belong, this is where I should always be! Thank you mistress!"

"... Oookay, this is a bit extreme," Harri said, "but, uhm, if you like it that's great," she said, nodding, "but you're gonna get me going if you keep being like this slut!"

"Ooooh mistress, show me! Make me yours! Make me just a fucktoy for you to use! Please! Break me into pieces and put me back together in the shape of a cock holster! That's all I want to be! Just a toy for you to get off! FUCK ME MISTRESS PLEASE!"

Harri began to laugh.

Not a giggle, not a chuckle, but full blown cackling laughter. "Oh my god, you're a total and complete slut, aren't you? Look at yourself, the mighty Queen of Slytherin reduced to nothing but a sow, begging for this halfblood cock. Nah, you weren't reduced to anything, this is way better!" Harri shouted, then began to cackle again, "This is so much better than that uptight little bitch that you were, isn't it?"

"YES! YES MISTRESS! I FEEL SO MUCH MORE FREE!"

Harri laughed. "You don't deserve my cock, you slut, you're gonna have to earn it. Oi, you there," Harri said, turning with a nasty sneer towards the gathered prefects. "Stop stroking your pathetic little dicks and come give this slut the gangbang she deserves! If she's gonna be such a good little slut, she deserves the very best reward she can get!"

The others seemingly broke from a trance. Instead of returning to the high and mighty offended bitches that they had been before, however, they immediately jumped into action. Knickers and skirts flew, shirts were ripped apart, pieces of cloth rained, as the five prefects of Slytherin surrounded their former leader.

"YES! YES PLEASE! PAINT ME WHITE! STAIN ME! CUM ALL OVER ME! CUM IN EVERY HOLE!" she screamed.

The others didn't speak, too busy throatily moaning and breathing hard as they approached from every side.

One slid under her, her cock quickly piercing Ekaterina's pussy, eliciting a scream and a pitiful orgasm from her, which produced a few sputtering ropes of semen.

Upon witnessing it, only then did Harri realize just how many times Ekaterina had cum as she had humiliated and berated the girl. She laughed once more.

A second girl quickly took her place, sliding home right into the slutty piggy's tight bumhole. Three took place in the front, as she put a hand on a dick to her left, another on her right, and took the one in front of her into her mouth. They weren't coordinated, they weren't really experienced at what they were doing, and absolutely none of them cared for anything but their own pleasure. As Ekaterina had to let go of one cock to put a hand on the ground to steady herself, she had her head roughly grabbed and forced down so the girl she was giving a blowjob to could pour her cum directly on her throat.

She pulled away and was quickly replaced by the two she had been giving handjobs to, but she didn't have to choose which to suck, as they kissed with their mouths and their pricks, allowing her to take both of them into her mouth at the same time.

The girl who'd just cum grabbed her hair and wrapped it around her cock, which hadn't flagged at all, and began pumping with the soft, silky but much abused mane.

Meanwhile, the two at the back had decided not to waste their time, and were just frantically pounded - each had cum twice, and Ekaterina even more times, staining her own breasts and those of the girl below her in semen.

Harri turned to her little sissies and offered them a beatific smile. "Girls, do you think you have a few more cumshots in you?" she asked. "I'm a bit spent," she said.

"Really?" Drache asked, blinking owlishly. "After that display..."

"To be honest, no, I could probably go for a while more," Harri admitted, "but I really, really want you guys to help me with this, ok?"

"Anything," Daphne said, eagerly and honestly. "Anything except, you know..."

"No, not that," Harri said, shaking her head. I just want you guys to cum all over those sluts. Show them where they belong so they don't try anything like this ever again," she said.

"Uhm. You're getting a little dark, big sis, are you okay?" Greggie asked.

"Why, yes, I am fantastic. She just tickled my sadistic bone, you know how it goes," Harri said with a light giggle. "Did I scare you?"

Drache blushed. "It kinda turned me on... Maybe we can try some light play like that later?"

"Of course, baby, don't worry, I'll be gentle and take it slow, you'll love it, I promise," Harri said, "but I don't think that's your kink... no, you're a different kind of sub," Harri said, taking a step forward and grabbing Drache's chin before planting a peck on her lips. "I'm so turned on right now I could fuck you where you stand," she admitted. "Don't look at me with those doe eyes, my love, you're just turning me on even more!"

"Oookay," Vinnie said, "This is..."

She gulped as she began stroking her own erection through her panties.

"That's my darling," she said, "now girls, come on, let's cum all over them! They would've wanted to soil you and stain you and mark you as theirs and we can't have that now can we but now we're gonna turn the tables on them!" Harri said with a nice and kind smile.

After the encouragement, each of them took position around the ruthlessly fornicating older students and began stroking their cocks.

Harri gave Drache a swat to her bum, fingered Daphne's a little bit, kissed Greggie's butt and gave Vinnie's pussy a long lick, before taking position herself and stroking her own cock, while fingering her pussy rather violently.

She saw that her little sissies began to cum, and she encouraged each of them, one by one, to keep going, to keep cumming, to keep stroking themselves to completion until they were completely empty, dragging multiple orgasms from each until they simply wouldn't squirt any more semen, and even then, she had them rub their cocks on the exhausted pile of older year students as they too lost steam and collapsed.

Finally, Harri herself came all over, eclipsing the amount of semen the others spurted as she allowed the build up to explode.

As everyone was panting and gasping for breath, Harri licked her upper lip, tasting a little bit of semen that had splashed onto her.

She looked at the fifth year prefect's ass, raised, her pussy puffy and drooling.

The girl squealed when Harri first hilted herself. "I'm going to breed you all before this night is done, try not to pass out!" she shouted, cackling.

The unnamed prefect orgasmed, completely dry, and then with a groan fell to her exhaustion.

"One down," Harri mused, using her arm to wipe her drool, "five to go..."

And so she continued.