Option 2: A Visit to Madame Malkin's

Professor Potter smiled and gave her daughter's ass a rough squeeze. "Well, I was thinking we could..."

"...get you your uniform first," she replied, "you don't want to end up in detention on your first day, after all." The words 'at least, not by accident' hung in the air, pointedly unspoken but very much thought. Hermione hadn't the faintest idea what the uniform entailed - the list of materials she was required to bring was surprisingly short and vague for what was supposed to be such a prestigious institution - but she could only hope that the amount of bare skin on display as the three of them stepped out of The Leaky Cauldron and into Diagon Alley was the norm at Hogwarts too.

They'd barely taken ten steps when a ditzy-looking young woman with dirty-blonde hair came up and planted a sloppy, wet kiss on Hermione's lips. The muggleborn witch found her hands drifting upwards and threading her fingers through the other girl's hair as she let out a muffled moan of shock - a moan that turned into a yelp of surprise as the other girl tilted Hermione's head back and an oozing load of hot, thick spunk flowed into her open mouth. Sparks burst behind the brunette's eyes and her knees buckled, sending her stumbling back into Rose's waiting arms when her 'attacker' pulled away with a giggle. "Wha...?" The world seemed so bright and colourful, the sounds of pleasure drifting from the buildings all around them seemed sharper somehow, like... like...

"Miss Brown," Professor Potter scolded the now-named witch, "what have I told you about snowballing centaur cum with girls who've not built up a tolerance for it?" Hermione thought the redhead seemed angry, but she couldn't find it in herself to share the same feeling; how could she, when she felt so good? She didn't hear the rest of the exchange, too busy marvelling at how incredible Rose's hands felt against her body as the dark-haired girl steered her towards a shop with clouded glass windows and a sign reading 'Madame Malkin's - Fine Clothes for Shameless Whores'. "Hey Maggie," Rose greeted the darker-haired of the two occupants as Hermione's gaze roamed over racks of skimpy, slutty outfits, "is your grandmother in?"

"Sorry Rosie, she's out right now," the girl - presumably the titular Madame's relative - replied, running her hands over her current client. The blonde's tongue circled the head of her lollipop teasingly as she caught Hermione's eye, making the brunette giggle. "This one another muggleborn?" Rose nodded, steering Hermione away from the racks and towards the centre of the room. "She's just swallowed a mouthful of centaur jizz," she explained, gesturing to Hermione's wide eyes and heavy blush, "poor bitch can't even see anything wrong with it, she's so deep right now." Maggie hummed and sent the blonde on her way with a quick slap on the ass. "They'll be ready for you to pick up in a week," she called after the girl, "and try not to leave it until the middle of the pre-Hogwarts rush if you want something quicker." She turned back to Rose. "Right, just the basics then - she can always alter them once she's started classes."

Hermione gasped in a mixture of shock and delight as her clothes vanished with a snap of Maggie's fingers, shredding off of her body and into smaller and smaller pieces, until they disappeared entirely. A new outfit slithered out from the racks in pieces, coiling around her body like serpents as each piece slid into place. Her nipples ached behind the cups of her new bra, her pussy tingled now that it was once again concealed - as much as something so sheer and lacy could conceal anything - behind a pair of panties, and the feeling of her too-tight blouse knotting itself closed sent a little jolt of pleasure through her suddenly-constrained tits. Her legs shifted under the influence of the over-knee socks they now bore, twisting her body this way and that so she could get a good look at her new school uniform in any of the shop's many mirrors.

"OH! This is, um," she struggled to pin the word she wanted down, too distracted by glimpses of lingerie and latex, or by how **** she was to give Rose or Maggie a kiss or ten. "It's so, like, super-hot!" Rose rolled her eyes, evidently not unused to seeing a bright young thing transform into a jizz-addled ditz after her first taste of centaur seed.

Option 1: Now that they've got Hermione into her new Hogwarts uniform, Rose and Maggie decide not to waste the opportunity to get her back out of it.

Option 2: A new customer (taking suggestions) arrives, attracting the attention of the thoroughly cumdrunk Hermione.

Option 3: Rose takes Hermione back out into Diagon Alley to do the rest of her shopping, the intoxicating effects of the centaur cum slowly wearing off.

Option X: Something Else