Somehow Harry had become very rebellious. This was probably due to his recent close friendship with one Draco Malfoy. Hermione was always teasing him that he was going over to the dark side because of it.

The pair were not named the Deadly Duo for nothing. They spent a lot of time in the Room of Requirement inventing new spells and hexes to prank people with. Some of these were quite cruel even by Malfoy's standards.

One included a hex that made the victim's hair turn into daisy chains.

Another they used on Ron in class once. Harry cast a spell on him to keep making him put his hand up and ask stupid questions. Draco then cast their own spell on him so that whenever he raised his hand he smelt strongly of BO and the class on that side of him gagged from the strength of the smell.

They also kept slipping him Denken Serum, a potion which made him speak exactly what he was thinking, with hilarious results.

They were even giving the Weasley twins a run for their money as they were pranking them as well. No one had ever dared to prank the infamous Weasley twins before and it wasn't long before a full scale prank war was initiated between them.

Fred slipped a Doxy into Draco's pocket, whereupon the hungry creature crawled out and bit his hand. Poor Draco had to spend the next three days in the hospital wing.

Harry responded by making Fred randomly sing the national anthem in the middle of all his classes. Naturally the teachers didn't like this and all of them gave him a detention.

George slipped Denken Serum into Harry's goblet of pumpkin juice at dinner, making him spill his darkest secrets to the whole school. And that included the one that said that he thought Draco was hot.

Luckily Draco himself wasn't there to hear it…or maybe not.

Those boys were really getting into it and they seemed to have no idea of the consequences their prank war had. One of these hit them where it really hurt.

Someone…was pranking them.

Someone other than the opposition i.e. the twins and the duo.

Someone else.

Someone was playing pranks on the boys.

And out of the whole school they had no idea how to find them and make them pay for daring to get in the way of the prank war. Or where to start looking.

"Who do you think it is?" Harry asked Draco and Ron as they sat in the library.

"I haven't got a clue."

"Don't look at me! I asked my brothers about it and they said that they wouldn't do that, even in retaliatory circumstances."

Harry noticed that Hermione, who was sitting nearby, was being very quiet and seemed to be working, when usually she would add her extensive brainpower and help them figure stuff out.

"What's up Mione?"

"What? Oh nothing Harry."

"You do realise that you're reading your book upside down, don't you?"

Her eyes widened.

"Oh! It's…um…it's sometimes easier to read upside down."

She got up quickly and rushed out of the library, fiddling with something in her pocket as she went.

"I don't buy it. She's up to something." Draco said.

"Hey, you don't think she's the one playing the tricks on us do you?" Ron said.

Glances were exchanged before Madam Pince ferried them out of the library because they were laughing too much.

When the quartet of pranksters woke up the next morning a recently vacated bucket of water was swinging in mid air above their beds and they themselves were soaked through. This had been the cause of their awakening. Ron saw Harry and chuckling left the room and saw his brothers standing outside their dorm, also soaked through. This time nothing could stop his laughter. Hermione and Ginny came to see what the fuss was about and also fell about laughing. None of the boys saw the winks they exchanged.

Draco, it transpired, had also been awakened by that floating bucket of water. As a result his hair went frizzy, as straightened hair has a habit of doing when it gets wet.

If he thought the mocking he had received for the ferret business was bad…well, let's just say it didn't compare to what he received this time around.

Over the next week more and more pranks were played on the boys, and Ron received some as well…just for good measure.

A normal book in the library randomly started attacking the twins as they sat working (for once!) and at the same moment the books Harry and Draco were poring over suddenly snapped at their hands. Ron's book went slightly further and bit him on the nose. He retaliated by grabbing another book and starting to whack at the book as it made for his nose again.

They failed to hear the muffled giggles coming from behind the bookshelves.