HARRY HAD NEVER KNOWN that the halls of Hogwarts, especially this close to the dungeons, could be so creepy. Sure, he had been out late at night before, but there was something comforting about having a poisonous, fire-breathing lizard which you could set on anything dangerous.

He, Fred, Hermione, Liam, and a seventh-year student named Peter Peter skulked through the halls of Hogwarts, attempting to find their way to the dungeons. Ron had been left behind to open The Fat Lady portrait once they were to return, and George had left to attempt to distract anyone who got in their way. The yowls of a cat were evidence that he was succeeding.

As they passed the Hufflepuff common room, Harry thought about the prank that they were about to pull, and wondered if anybody from the other houses would play along.

Finally, they reached Slytherin House. It was Peter Peter's time to shine. The reason they had brought him along was because he was an Arithmancy and Ancient Runes student. Not a normal student though. He was the top student of both classes, having completely full marks on his O.W.Ls and was on the same track for the N.E.W.Ts.

As he started to place strange blocks of wood along the snake portrait at the entrance of Slytherin House, Liam waved his wand upon the portrait, muttering words, and Fred and Hermione acted as lookouts.

It was a nerve wracking half hour before they were able to finish what they were doing and tidy up.

Tomorrow was going to be interesting.

DRACO MALFOY HAD been having a great week. First, he'd find out that Potter has been hiding a dragon with the oafish gamekeeper, and he'd gotten them caught. Sure, he lost points and got detention, but the Gryffindors losing a whopping 150 points all the more made up for it.

He was applauded by the rest of his housemates for his efforts, and even Professor Snape had (privately) praised him. He carried this feeling of euphoria down to the common room, and out to the great hall. So lost was he, and many other Slytherins, that they didn't notice the strange feeling that washed over them, as well as the slight change growing across their robes.

As they began to enter the Great Hall, they noticed something weird. There were already Slytherins at the House Table. Now this wouldn't have been weird in and of itself, but the problem lied in the quantity. The Table was full of students, which wasn't possible, since half of the Slytherins hadn't even arrived yet.

Draco angrily stormed his way towards his usual spot and roughly grabbed the student seated on the bench and turned him around and was faced with… Harry Potter?

What was Harry Potter doing at the Slytherin House Table? And why was he donning Slytherin robes?

In fact, this question was voiced by a student.

"What is Harry Potter doing at the Slytherin House Table?" Lillith Moon exclaimed. "And why is he donning Slytherin Robes?"

"What are you talking about, Gryffindor?" Potter sneered. "Go back to your pinsy-pansy House Table where you'll talk about how your house is the bestest one to ever exist. Your delusions are certainly... amusing."

Draco grew furious at this comment. Potter had the audacity to call him a Gryffindor?! He had the audacity to call any of them a Gryffindor?! He'd wipe that stupid sneer off his face!

"Look here you-"

He was cut off by Marcus Flint, at the other end of the table, shouting,

"Malfoy! Why are your robes of Gryffindor?!

Draco looked down at his robes in shock, as did the other Slytherins. It wasn't just his robes, it was all of theirs! Everyone who Draco could recall being sorted into Slytherin was wearing a Gryffindor robe.

His thoughts were suddenly interrupted by a sandy-haired boy, who Draco vaguely recalled as being named Lime, or something like that, speaking up.

"Gryffindors, we know that you would like to be re-sorted into our house, but as Head Boy, I must instruct you to return to your House Table, unless you have been invited here."

Flint looked like he was about to have an aneurysm.

"But… but… this is OUR TABLE!"

"No need to yell," started that Mud-blood Granger. "It's understandable that you would wish to be sorted into Slytherin. However, what's done is done."

The blood-traitor redhead Weasel spoke up. "Yeah, Malfoy. Go back to your own goddamn table!" (The Griffindors would only find this out later, but Ron was emulating Malfoy himself. Truly a horrendous role.)

The Slytherins could truly not understand what was happening. They knew that they were Slytherins, but a tiny sliver of doubt was creeping into their minds.

Daphne suddenly had an idea. It was foolproof, and would finally end this debate.

She called over across the hall to a 7th year Ravenclaw named {Insert First Name} {Insert Surname} (She had first almost called out to the Gryffindors, before remembering that they sucked. Then she remembered that they were Slytherins. Then she almost asked the Hufflepuffs before remembering that they were… a bunch of pansies.) and said, "Hey, you! They're Gryffindors, right? And we're Slytherins?"

{Insert First Name} {Insert Surname} thought for a moment, and as the entire student body watched with bated breath, he gave his answer.

"Nah, you guys are Gryffindors."

IT WASN'T LONG until the Professors appeared.

They were met with the sight of hysterical Gryffindors. However, after a few seconds of observation, it turned out they were Slytherins in Gryffindor Robes. Professor Vector made the amusing (to her, others would call her biased) comparison to a wolf in sheep's clothing.

Professor Snape, on the other hand, was furious. Why were the Slytherins wearing the robes of that… that… vapid house?!

Before he could address anyone, the 7th year Head Girl, (who he knew was a Gryffindor) came up to him.

She sniffed (sniffed! Snape had never seen Adelaide Wildwood sniff!) and said, "Professor Snape! These foolish Gryffindors are claiming that they are of our house. As you are our Head of House, you must do something about this horrendous insult."

Snape tried to reply, but Potter (Potter!) came up to him and said, "Truly Professor, I cannot begin to understand how these Gryffindors are allowed to impersonate the House of The-Boy-Who-Lived! Speaking of, Professor Dumbledore! We're still on for those private training sessions later, right?" Harry then pointed finger guns at him.

No one would accuse them of this, but both Hagrid's and Dumbledore's mustaches twitched in amusement.

However, Professor McGonagall came forward and shut everything down.

"Gryffindors, take off those Slytherin robes! Slytherins, take off those Gryffindor robes! 20 points from both of your houses!" She was slightly amused, but as Deputy Headmistress, she had to be more impartial than most.

Then the last thing she could have expected to happen happened. The Slytherins started sputtering and complaining, and the most anyone could make out was "It wasn't our fault!", and the Gryffindors started… cheering?

Yes, they were cheering. Cheering at losing House Points. Well, if they were so happy, then Snape would teach them!

"Gryffindors! One point taken away for each second that you continue to wear those Robes!"

Liam had been about to disenchant all their robes, but the moment he heard that, he stopped. And Professor Flitwick noticed. He elected to remain quiet, and instead silently removed the charm himself after a few seconds. He wanted to see why they were actually doing this, and exposing them here would deprive him of the answer.

Now that the both sets of robes were turned back to normal, and both Houses had returned to their tables, the Hall seemed to quiet down quite a bit.

Snape would (obviously) reimburse Slytherin those points, but at this point Gryffindor lost 37 House Points. Snape had no intention of letting it remain so low.

"Now that that's over, a few more points must be taken, seeing as my Slytherins had no role in this. But before I take those, Mr. Peter! 5 points for getting food on your robes!"

"That's a bit unfair, but I must ask. Are you calling me by my first name or by my surname?"

"What sort of foolish question is that?! We all know that your first and last name are the same! 5 more points for such an idiotic question."

"Wait," interrupted a 4th year Hufflepuff named Beatrice Haywood. "Your name is Peter… Peter?"

"Yeah!"

"Why?"

"My parents were drug addicts!"

"Yoooooooooooooooo! Mine too!" said {Insert First Name} {Insert Surname}.

"Really?! Which kind?"

As the two began conversing about the various types of drugs their parents were addicted to, Snape turned away. He might as well take away more points.

"Gryffindor! 5 points from every student who participated in this foolish act."

Again, Gryffindor started cheering, and Snape could not figure out why. Aurora Sinistra, on the other hand, had already figured it out. She went close to Snape and whispered in his ear, "Maybe take 3 points for being happy about points being taken away?"

Snape almost smiled. What a spectacular idea! So he did just that.

They cheered again.

Dumbledore, on the other hand, figured it was time to intervene.

"Well, Severus, as much as I admire your adherence to rules (Professor Sprout scoffed), there are some points I must hand out."

"To Gryffindor and Slytherin, 10 points to each student who wore each other's robes, displaying inter-house unity. To Miss Beatrice Haywood, 10 points for getting another student to open up about a difficult aspect of their lives. To Mr. Peter Peter and {Insert First Name} {Insert Surname}, 20 points for sharing difficulties."

The Slytherins calmed down.

The Gryffindors booed.