Disclaimer: I do not own any of these characters, they all belong to Mrs Rowling.

Chapter One

She glanced over at them... again. They were using innocent first years as guinea pigs for their nosebleed nougats. She thought this would have stopped when she threatened to rat them out to Mrs Weasley.

Obviously not.

They'd already tested out their Fainting Fancies a few days previously. Why did they insist on making her life as prefect as difficult as possible!?

Technically they weren't doing anything wrong, but in Hermione's books exploiting 11 and 12 year olds was down right wrong.

Her insides squirmed with indecision. She'd had a bad enough day and confronting the twins would probably just make it worse than it already was.

Suddenly a small, dark haired first year dropped to the ground. He was transforming into a shrivelled prune. He was ghostly white and the blood just kept flowing. One of the twins was frantically trying to stick something into the little boy's mouth.

Hermione groaned and stood up from her cosy armchair. She couldn't ignore a child that was surely going to bleed dry if she didn't intervene.

She hurried over to where Fred had just managed to stop the boy bleeding. He was wiping his hands on the back of his robes when he noticed the tense figure looming over his crouched body.

He stood up and grinned stupidly at the disapproving face of Hermione Granger.

"Granger, how can I help you on this charming day," his blue eyes sparkled mischeviously.

She contintued to stare cold and hard at him. There was nothing he could say to take her off the warpath today. She was determined about that. She had mis-translated a word in her last ancient runes homework assignment and had been frustrated all day. She needed to vent her anger in some way; Fred and George were basically screaming at her to take it out on them.

"You need to stop using first years as guinea pigs."

"They signed up to do it Granger, it's not like they're under an imperius curse. Have you not got some book to be reading?"

Hermione's already stern glare hardened.

"Something could go wrong. It's not safe," she ignored his snarky comment about her love of books.

"We've tested them out on ourselves, it's totally safe. Do we look okay to you," he grinned leaning back against an armchair where George was sat making notes on their experiments.

"You're insane anyway. That first year could have easily died," she hissed through gritted teeth.

"I was here to make sure he didn't," he shrugged lazily.

Hermione could feel her temper flaring like a match thrown into petrol.

"We're talking about lives Fred! Real lives at risk here because of your stupid experiments!"

"Hey, they're not stupid," George said, from his spot on the couch, mock wounded.

Hermione ignored him and kept her glare fixed upon Fred who was running his hand through his hair.

"You're being over dramatic," he said simply.

"I'm not the one threating kids' lives."

"For Merlin's sake Hermione, we know what we're doing! We're being responsible about this."

"The day you're responsible is the day I make friends with Umbridge."

"What's that supposed to mean?"

"It means you're immature 17 year olds who act like they're still 5 and couldn't be responsible if your life depended on it."

She pursed her lips, her arms folded across her chest. Fred and George both glared at her angrily. Everybody knew Hermione had a temper but so did the twins.

Silence settled all around the Gryffindor common room. All eyes were focused on the battle between the two red heads and the frizzy brown head.

A few moments passed - filled with steely looks - before either of the three spoke.

"Well Granger, what are you going to do about it," Fred whispered menacingly.

He took a step forward and Hermione realised for the first time truly how much bigger he was than her.

It was too late to back down.

The question was, what was she going to do about it? She racked her brains for some inspiration. She'd already used her Mrs Weasley threat, she couldn't give them detention because what they were doing wasn't breaking any rules and she didn't want to take house points away from her own house. She sighed inwardly. Then lightning struck in the form of inspiration.

"I'll confiscate all of your products."

"How are you going to do that," George snorted.

"McGonagall will be interested in your experiments, don't you think?"

Fred's eyes suddenly became slits and he glared at her colder still.

"You wouldn't," he seethed.

She smirked smugly suddenly, "Oh I would."

He turned on his heel and stomped off up the staircase to the boys dormitories. George was quick to follow after glaring at Hermione one last time.

When she was sure they were gone she groaned and fell back into the seat George had been occupying. She closed her eyes and began to rub her temple. Knowing the twins, they were probably concocting some plans for revenge as she sat there helplessly. It was her own fault really, if she had just translated sacrifice correctly in her homework then she would have been in a better mood. She might even have let the twins get on with whatever experiments they were conducting. She went back over to where she had been sat working on her charms assignment and packed her things up. She wouldn't be able to concentrate after the argument with the twins. She would be too busy wondering what they had brewing in their genius prankster minds.

*:*:*:*:*:*:*:*:*:*

"We can't let her get away with this Georgie. Granger does not humiliate us in front of the entire Gryffindor common room, threaten to confiscate our products, insult us and get away with it."

Fred began pacing the floor of their dormitory for the umpteenth time. He was furious. In fact he was more than furious: he was livid. How did frizzy haired, book worm Granger dare humiliate him and his twin. He had to get revenge. He couldn't relax until they had a decent plan to get back at her.

"I know."

He stopped pacing and looked over at his twin. George was in his pyjamas and lying in bed.

"What are you doing?"

"What do you mean," George asked inquiringly.

"I mean, why the bloody hell are you lying in bed and being so calm about this!?"

"Well, I mean, she sort of had a point didn't she? We are immature and there's nothing wrong with that, the experiments are a bit dangerous but so what. You're getting worked up about a book worm with a shiny prefect badge."

Fred scowled, he couldn't see how his twin was being so calm. George noticed the annoyed look on his twin's face and sighed.

"If getting Granger back means so much to you, fine. We'll figure something out."

A satisfactory grin spread over Fred's face.

"I have something in mind that will make Granger think twice before crossing us again."

Both twins smirked evilly at Fred's words. No matter what, pranks + revenge = chaotic fun. Always.