Disclaimer: I am not a billionaire. I do not own Harry Potter. Sadly, nothing can change that.

A/N: In the last chapter, I said that Harry (as Snape) would be "sick" the next day, but as soon as I started writing this chapter, I realized that it didn't really follow my outline, so just ignore that part. :) Thanks!

"Pureblood," Harry muttered as he entered Snape's chambers. What an awful password. Why did blood status even matter? And, after all, Snape was a halfblood like him, so why is his password "pureblood"? Probably to impress Voldemort, he mused thoughtfully. He stepped into the room and gasped. Who knew a room in a dungeon could be cozy? Why did Hogwarts even have a dungeon? But it was, and maybe even cozier than the Gryffindor common room. There was a fire blazing in the hearth, green stuffy armchairs around the fire, and a huge mahogany bed with green sheets. The wallpaper was actually made of emerald green velvet, and there was even a window in the dungeon that showed a magnificent view of the lake. No wonder Snape never complained about where he lived. Who would if they had a place like that? He quickly cast a cleansing charm over himself and climbed in the bed. The mattress felt like pure heaven, and soon Harry fell into a deep sleep, only plagued with dreams about Snape turning into him, and him turning into Snape. At least it was an improvement, not having to dream about a noseless guy with a flat face every night.

When Severus finally finished helping Dumbledore with the potion, it was already three thirty in the morning. He was about the fall asleep standing, while Dumbledore still sang cheerfully under his breath about an old horned wizard with a toad that turned him into a goat. Honestly, how could that man go by with so little sleep? When Dumbledore finally dismissed him, he was so tired that he started making his way towards his bed in the dungeons, but realized he was going the wrong way halfway there. Sighing, he turned around and made his way up to the Gryffindor Tower while trying to escape Filch and Ms. Norris. He figured that Argus wouldn't appreciate a student roaming around Hogwarts so late. As Severus approached the Fat Lady, he was suddenly assaulted by a flashback.

Lily hadn't yelled at him, instead, she spoke to him in a voice much like Dumbledore's, and ended their friendship right there. That was the last time Lily Evans had spoke to him. He had tried many times to get her attention, but every time he looked at her, she would turn away and get hastily involved in a conversation with a person who was walking by. Once, when he finally cornered her alone, she had stunned him nonverbally, only to be found by the Marauders who congratulated her and made fun of Snape again, which she tolerated. He had only been to the Gryffindor tower once after that, when all the teachers were required to go on a tour of Hogwarts. He gave the Fat Lady the password, and she let him in. He walked up to the fifth year boys' dormitory, and immediately found himself staring at Weasley, who was drooling into his pillow, and Longbottom, who was snoring his head off. He sighed. This would be a long four months.

Severus woke up the next morning to Weasley and Finnegan having a shouting match. He really didn't know what it was about, but it sounded like Potter had called Finnegan's mom a liar because she thought the Dark Lord wasn't back, and Weasley was defending Potter. He had to give it to the boy, Weasley sure knew how to protect his friends, but did they really have to wake him up this early?

He groaned and threw a pillow over his face before realizing that this wasn't very professor-like. Then, he realized he wasn't a professor, but still thought better not to. He sat up and stuck his glasses on his face, or rather, Potter's face. This was getting to be very confusing. Finnegan stormed out of the room, with Thomas following and giving Weasley a sheepish smile. Longbottom was still asleep. Gryffindors were weird. Suddenly, Weasley noticed him.

"Hey, mate," he greeted. Weasley was calling him mate? This was really messed up. "Seamus again. Ugh, why won't he just believe you? Even Dumbledore says it's true. And, did you see him, stomping out of the room like that? Way to be mature. Hey, what did that slimy git do to you after he kept you after class? I meant to wait for you, but Hermione wanted to go to the library, so I had to follow her."

Severus growled under his breath. Did Weasley know that he insulted Severus right in his face? And he was not slimy. How did that rumor even come up? No one had actually squeezed him before, so how could they know he was slimy? He smirked, a plan already forming in his head.

"Professor Snape kept me after class to tell you that your performance in his class was horrendous. Personally, I quite agree with him," he said, smiling evilly. Weasley looked affronted.

"Thanks, Potter," Weasley answered sarcastically. He stormed out of the room, too, ironically the exact same way Finnegan had just done. Severus shrugged, and after a while walked to the Great Hall for breakfast. He didn't want to stay in the same room with Longbottom alone unless he had to.

Harry sat at the teachers' table in the Great Hall, making forced conversation with Professor McGonagall. He was having a hard time keeping a blank expression on his face. McGonagall kept trying to make him laugh by telling him the stupidest but funniest jokes. Apparently this was a daily occurrence to see who could crack Snape's stony façade. Only Dumbledore had succeeded once, seven years ago, but that was because when he was eating a slice of blueberry pie, the whipped cream and blueberries somehow got stuck all over his beard, making him look like a blue Santa Claus. But, as soon as Snape cracked his first smile that wasn't intended to embarrass someone, he instantly denied it. Harry was having fun listen to all the hilarious stories of the students, but it was really hard to keep a straight face. Professor McGonagall, one of the most serious professors, was telling jokes? Professor Flitwick and Hagrid were watching amused, while Trelawney thoughtfully poked her eggs with her fork and muttered to herself about bad luck from sunny-side-ups. Umbridge was watching them with a disapproving expression, no doubt making a mental reminder to inform the Ministry about "this appalling behavior". Dumbledore laughed cheerfully at McGonagall's jokes, but his eyes remained fixated on Harry, sending him the silent message, "Whatever you do, don't laugh."

Harry understood this, because he knew any suspicious behavior would put their plan into jeopardy. He missed being able to do something without having to think of the consequences. All of his life now was practically a web of lies. Harry's thoughts were interrupted when Ron walked into the Great Hall, looking angry at something. He frowned. Where was Snape? After a while, Snape entered too, looking very pleased at something. He took a seat as far away from Ron as possible, but throughout the meal they kept glaring daggers at each other. Harry frowned deeper. He shouldn't have thought that putting Ron and Snape together as friends would work, but Snape told Harry that he would try his best to act friendly. Fine, he thought. If Snape ruins my friendship with Ron, then I'll ruin his reputation as a Gryffindor-hater. He smiled evilly. Suddenly, great shouts came up from McGonagall, Flitwick, and Hagrid. They thought that Professor McGonagall had actually succeeded. Harry groaned. Well, that was one way to be un-Snapelike.

The first class of the day just had to be the NEWT class. Luckily, Snape had a lesson plan stashed in his drawers, and today they were reading about the Polyjuice Potion and taking notes. Harry actually knew some stuff about the Polyjuice, considering the fact that Hermione had managed to brew it successfully in their second year. Well, Harry hadn't actually helped Hermione make it, but he had taken it, which in hius opinion, counted as knowing all about it. The students filed in silently, but this time, they were Ravenclaws and Hufflepuffs. There were about two Hufflepuffs taking the NEWT level course and all the Ravenclas, making the class a total of twelve. This wasn't going to be very hard. Harry decided to start off acting like Snape.

"The Polyjuice Potion," he said in that creepy silky voice that only Snape (or someone who was stuck in Snape) could achieve. "It will allow the taker to become another person for one hour. The user still retains his or her own voice and mind. This potion is very hard to make, and I don't expect any of you to actually achieve it, the idiots that you are. It requires one body part from the person you wish to morph into. After one hour, the user will change back normally, if the potion is brewed correctly. If it isn't, then the person could retain the shape of half of him and half of someone else." Harry finished his speech, quite proud of is knowledge of the potion and his ability to act like Snape.

A Ravenclaw's hand shot up. He recognized it as Roger Davies'. Harry knew it was time to drop the stony demeanor of Snape and transform into Mr. Nice Guy. Knowing that Snape would have normally disregarded the raised hand or made some snarky comment about know-it-all Ravenclaws, Harry decided to do just the opposite.

"Yes, Mr. Davies?" Harry said, even managing a smile. The students started. The smile probably looked more like a grimace; he would have to work on that.

"Er…I was just wondering, why does the user keep his own voice?" Roger asked.

"The taker is still his own person. The Polyjuice is sort of like a disguise. Is everyone familiar with what a Metamorphmagus is?" Harry asked, enjoying being a nice Snape. The class nodded. "So, even if the Metamorphmagus changes his or her appearance, he or she will still sound the same and keep his or her same personality." This was actually fun!

"That's the first time I've actually been able to understand Snape's class," whispered a Hufflepuff to her friend. Snape must have extra sensitive hearing, because the Hufflepuff was all the way at the back of the class, and Harry could hear her perfectly well. Another Ravenclaw raised her hand.

"Is there a potion that can actually make someone change and sound like someone else?" she asked. Harry started. Yes, he thought. I just had some explode on me last night. And now, me, the Boy Who Lived, is stuck teaching a class of seventh years who know less than me.

"I can assure you, Miss Turpin, that there is one, called the soul-switching potion, which has only been made once," Or twice. "It has never been successfully brewed again." The rest of the class went on like that, the students asking questions, and Harry answering them (even if he made some answers up). The lesson plan said to give the students a fourteen inch essay on the effects if the Polyjuice was brewed incorrectly, which Harry thought was pointless, because they had just discussed it in class. It had taken one sentence, not fourteen inches.

"No homework," Harry said pleasantly. "Dismissed."

The students left, wondering if their Potions professor had suddenly been possessed by some evil spirit that was actually nice.

At lunch, Harry ate with the other professors. After much consideration after that NEWT class, Harry decided to make Snape bipolar. He became Snapelike again at lunch, confusing the other professors greatly, except for Dumbledore, because that old man was never confused.

"The NEWT Potions students from my house informed me that you were being especially nice to them in class today, Severus. Is there any good news you'd like to share?" Professor Flitwick asked. Professor Sprout nodded. Harry hated being called Severus. He decided to pretend he didn't have a clue what Flitwick was talking about.

"Filius, what are you going on about? I treated them just like I treat everybody. Now, if you'll excuse me, I've got a fifth year class to prepare for." And with that, Harry swept from the room, robes billowing out behind him, making him look very much like an overgrown bat.

That kid's a good actor, Dumbledore mused to himself as he offered Professor Sinastra a Peppermint Humbug.

A/N: Wow, more than 600 hits! Thank you all! Please keep reviewing! More reviews means more chapters because they help me through this writer's block that's starting to form! And to people that have bipolar disorder, I have nothing against you. :) (I'm actually bipolar, too.) I just thought it would be funny if Snape was. Haha

SpencerReid: Thanks…yeah, that's pretty much what I was thinking. Harry will finally realize that Snape suffers more than him (but more angst before that) and Snape will know what it's like to have someone care about him. :)

Moerie: Glad you're back! Yeah, I thought Freaky Friday was hilarious, and I've read a few soul-switching stories, so I decided to do one of my own. :) And yeah, I usually don't write this fast, but usually, once I get started on a chapter, I have to finish it because I hate to leave things hanging. :)

Katconan: Yeah, I know that Harry was actually not that bad at POtions, but he doesn't actually know this because it's still in the middle of his fifth year and he hasn't even taken his OWLS yet, so naturally, he thinks he's terrible at the subject. And about Snape writing on the board, I kinda don't want to include that, because every time I imagine Snape writing something, I picture a bat trying to hold a pencil. Lol! And I'll be sure to include Draco messing up Snape's potion in the next few chapters!

Dem bones: Yeah, like I said in my profile, I hate slash fics, so I definitely won't write one :) Have you really read a Harry/Snape soul switching fanfic before? I haven't, and I really want to read one. That's so cool….And I've never really liked writing stories about a main character being abused, because I can never get their reactions right, so you won't see any of Uncle Vernon physical abuse here. There may be some verbal, but I won't actually write about what he'll do. :)

Shu-chanX: Yay! You're back, too! Thanks, and I'm really looking forward to the Death Eater meetings, too!

And, thanks to hobesan, Conangse, and sbcarri! You guys rock!