A/N: This is pretty graphic and if that isn't your thing DON'T READ IT! Warning over, hope you enjoy :)
Hermione strutted down the corridor of the Hogwarts Express, smiling as the students made way for her, amazement obvious on their faces. No longer was she the ugly Gryffindor bookworm. Her hair was long, curly and glossy; she had big doe brown eyes with thick lashes and ripe, plump, pink lips. She was wearing the Hogwarts uniform, but not like anyone had ever seen it worn before. She had knee high black stockings with suspenders obviously visible, a scrap of material that could laughably be called a skirt that barely covered her large, shapely ass. Her high black shoes showed off her long, tanned legs that went on for days. Her school shirt was absurdly small with the top buttons undone so that her E cup breasts were spilling out and her tiny waist was shown, while her tie hung loosely around her neck. As she walked down the corridor, she blew a kiss at Ron and Harry in the door of their usual apartment, who blushed before they started as they realized who she was. She carried on down the corridor until she found a compartment with only one person sitting inside it, Dean Thomas, a tall and well-built Gryffindor sixth year.
'Can I sit in here?' she asked softly.
'Sure,' he said, before looking up and realizing who had just walked into his compartment. She stepped inside, closing the door behind her and whispering locking and silencing charms. As she reached up to put her luggage on the rack her skirt rode up so Dean could see the whole of her ass, clad in only a black thong. The view was improved even more when she dropped her wand and bent down to get it giving Dean a full view of her tanned, apple-shaped behind; Dean's pants became uncomfortably tight as he looked on as she picked up her wand and sat herself down opposite him.
'How long is your wand, Dean?' she asked.
'Excuse me?!' he spluttered.
'My wand just isn't enough for me anymore. Now I've had larger ones I find it's not working for me, it's not satisfying me, you know?' As she said this she moved her legs apart and he was shown the full view of her pussy, her arousal soaking its black lace covering and dripping onto the seat. A whispered charm caused the lace to disappear and all he could see was her moist, red cunt; her wetness spilling down her legs. Normally Dean would have been wondering what was wrong with Hermione, but all the blood in his body was being directed towards his cock as he watched Hermione insert her wand between her pussy lips and began to pump it back and forth slowly.
Dean could only watch as she began to moan as she picked up the pace, thrusting her wand faster and faster into her dripping wetness, the length glistening with her juices. Soon she was pistoning her wand in and out of her cunt at an unbelievable rate as she cried out in pleasure. She threw her head back and was panting and moaning as Dean realized he'd unknowingly undone his pants and was rubbing his cock furiously as he watched her erotic display. Her erect nipples were straining at her shirt as the wand continued going in and out. Dean didn't think he'd ever been more turned on in his life as Hermione brought one hand up to play with her nipples, making her whimper in pleasure as the other continued to pound her wand into her cunt. She whispered a charm and the wand began to move ferociously into her cunt by itself as she moved her hand to her clit. Her panting got louder and louder she began rubbing her clit frantically as she continued to play with her nipples whilst her wand fucked her ferociously, her wetness spilling out of her cunt and down her thighs. Her ministrations on her nipple and clit were causing her to lose all control as she bucked up and down on her wand wildly, writhing in pleasure. Hermione's wand was a blur as it moved frenetically into her cunt, as she felt the buildup of a familiar sensation. She orgasmed violently; spilling her cum all over the seat as the wand fell out of her hand as she screamed in pleasure.
After a moment of recovery she looked over at Dean who was still rubbing his cock frantically, trying to find release. She smirked as she looked at his beautiful penis. It was long, thick and hard, glistening with his sweat and she wanted to taste it.
'How long is your wand?' she asked again.
'Which one?' he replied breathlessly as he continued to stroke himself, 'I'm sure either would satisfy you,' he smirked.
'I can see that.' She smiled as she knelt before his erect cock and licked its purple head.
'This should definitely be enough to satisfy me,' she said as she took his massive cock in her hands as she continued licking it all over. Dean groaned as she slid her plump lips over the head of his cock and began to move up and down slowly. Her hot lips engulfed his cock, but it wasn't fast enough. He grabbed her hair aggressively and began to thrust into her mouth, setting a fast pace.
Hermione moaned with pleasure as Dean fucked her mouth, this turned her on so much. She wanted to feel his balls tighten as hot cum spurted out of his cock and flooded her mouth. She wanted to taste him deep in her throat and swallow every last drop of his gorgeous cum. She moaned around his cock as he took control, half of his cock sliding through her mouth over and over as she used her hands to rub his exposed length and squeeze his sack.
Her moans vibrated through him causing him to grunt and thrust his entire length into her mouth and throat. She engulfed his cock with her hot mouth, fighting her gag reflex to deep throat him and he grunted in pleasure, feeling the head of his cock hitting the back of her throat. He watched her bob up and down on his cock furiously as her hands fondled his balls, playing with them, squeezing them, all causing the pressure to build.
She took her head away from his cock to lick the vein on its underside before sweeping her tongue around the head of his cock. She deep throated him again, using her mouth to suck at his cock before releasing him and letting his cock slide nearly all the way out of her warm mouth until he grabbed her and forced his cock back in, fucking her mouth ferociously.
Dean watched her mouth form an O around the tip of his cock as he sunk his length in and out of her. Watching his cock disappear and reappear from between those perfect lips was so erotic he could feel himself getting close. He gave one final almighty thrust deep into the back of her throat as his balls tightened and he released his load into her mouth. Spurt after spurt of hot cum shot into her mouth as she swallowed, but it was too much and some of it spilt out the sides of her luscious mouth.
She swallowed it all, licking around her mouth in delight as he fell back onto the seat, his cock limp after the best blowjob of his life. Hermione stood up to get her luggage down and leaned over him again.
'Meet me in the Room Of Requirement at 11pm tonight,' she whispered before unlocking the compartment and strutting out, leaving Dean speechless and slumped on the seat.