Disclaimer: I do not own Harry Potter. The wonderful JK Rowling does! I wish I did, then I'd be rich! Just kidding! Please don't sue me for writing a fan fic that I really hope you enjoy!

(A/N: "Present Time" is not "all the way" or anything remotely rated R. I would say around the PG-13 area.)

¤.¸¸.·´¨»«´¨·. ¸¸.¤

Sirius, Remus, Peter and Marissa were on the couch in the Common Room talking when Lily and James came back from, uh, present time.

Sirius put his hands over his eyes and ran around the Common Room yelling, "IMAGES! BAD IMAGES! AHHH!"

"Can it Starlight," Marissa said. She grinned at Lily and raised her eyebrow.

Lily shook her head "Can't tell you a thing, it's our little secret."

Marissa's smile fell from her face "Well then I won't tell you Remus' secret." When she said that Remus blushed deep scarlet.

Lily hurriedly sat down next Marissa "What is it?"

Marissa shook her head "You won't tell me, so I won't tell you!"

Lily rolled her eyes "Fine, but I give you NO details." Lily pulled Mara over to her and whispered in her ear. When she stopped, Marissa burst into a fit of giggles. James still stood there, smiling. He grabbed Lily and wrapped his arms around her waist. Lily smiled and turned so that she was looking at Marissa, but so James still had his arms around her waist. "So tell!"

"Remus asked out Brielle and she said yes!"

Lily had her mouth open and James was staring (the grin still on his face). "Way to go mate!" James said.

Marissa smiled. "That's not all. Right after she said yes, she pulled Remus close to her and they snogged for about a half hour."

Lily still hadn't said anything, her mouth hanging open. James grinned even more widely (if possible). "He shoots, he scores!"

"Could you be any more corny?" Lily said playfully.

James ignored her, "So you guys are immediately serious then."

Sirius shook his head. "No, I'm Sirius!"

Remus rolled his eyes "Enough about me. Listen, we have a huge prank we need to think about. In about two days the potion will be ready. I'll tell you all when it's time, and we'll begin Mission Mix-Up."

¤.¸¸.·´¨»«´¨·. ¸¸.¤

The bell rang throughout the school, signaling the end of classes for the day. "Your homework is 12 inches of parchment on the Fidelius Charm, due next class. Have a nice day!" squeaked Professor Flitwick.

Lily was picking up her quill and parchment when Professor Flitwick said, "Miss Evans, please come see me."

Lily walked up to his desk, curious about what he wanted. Flitwick looked at a stack of parchment on his desk. "It says here you signed up for the tutoring program, correct?" Lily nodded, "Yes, well, a fourth year student needs it for this class. Her name is Claudia Krueger, and she is in Gryffindor. We are practicing Summoning Spells and Banishing Spells. She doesn't seem to understand the concept of it. I would like it if you were to work with her on it, starting tonight."

"Yes sir, it would be a pleasure," Lily said. As her mind drifted towards the huge stack of homework in her dormitories, and then to the prank the Marauders were going to play.

Flitwick smiled "Good, good. Work with her on it until she gets it right. She needs to master this in order to pass charms. Thank you Miss Evans, that will be all." Lily nodded and walked out of the classroom.

¤.¸¸.·´¨»«´¨·. ¸¸.¤

Lily put her book bag on a table in the far corner of the Common Room, and then she headed down to the Great Hall.

"Hey Lillian! Heading down to the Great Hall, I presume?" Lily whirled around on the staircase, but accidentally fell into the trick step on the stairs. She looked up and saw Sirius walking down the stairs.

"Thanks for trapping me in the stairs, Sirius," Lily said sarcastically.

Sirius looked offended "It's not my fault you're clumsy. Here, let me help you, that must hurt." He put his hands under her arms and lifted Lily out of the trick step.

"Thank you Mr. Black. Would you care to be my escort to dinner?" Lily said with a mock curtsey.

Sirius bowed "I would be delighted, Miss Evans." He held out his arm for her and she took it, as they walked into the Great Hall.

They took their seats next to the other Marauders, Marissa, Brielle, and Danielle.

Lily felt some one tap her shoulder. She turned to see a girl with curly blonde hair and astounding blue eyes looking at her. "Hey, are you Lily Evans?" she asked.

Lily smiled "Yes, would you be Claudia Krueger?"

Claudia nodded "Is it ok if we start practicing in the common room right after dinner? I have a load of homework."

"Yeah, that would be best. I do too, but we'll take as much time as you want," Lily said.

Claudia nodded and smiled. "Thanks for helping me." She then turned and walked towards the end of the table.

Marissa looked at her questionably. "What was that about?" she asked.

"Oh, I signed up for a tutoring program in Charms. You get extra credit if you tutor someone."

Sirius snorted, "Like you really need extra credit. You're the top student in the school for Charms."

Lily gave him a dirty look "Yes, but it looks good on your job application."

"What job do you want to get Lily?" James asked.

Lily was about to open her mouth to say something, but paused "I never really thought about it. What I really want is a family. But I never considered an actual occupation before..."

Sirius choked on his food "Lily Evans, Miss top student, always turns in homework on time, Lily Evans, doesn't know what job she wants? James, did you hear that?"

James looked astounded too "I did hear that! Wow, I thought you would've had your job picked out since first year!"

Lily looked flustered "Yes, well, I guess I've been so busy about making myself look good for a job, I've never actually came up with a job to do. A Healer is something I've always thought about doing because I like to help people, but you have to get through a lot of schooling and it would be heartbreaking to not be able to save some people."

Sirius and James were about to taunt her more but Remus could tell that Lily was getting embarrassed, so he quickly changed the subject. "Hey, did you guys hear that Quidditch match on the WNN? Cannons versus Wasps?" he asked. Sirius and James both snapped their attention to him and excitedly started discussing the finer points of the game.

Lily gave him a warm smile. While James and Sirius were having a fight over a penalty called during the game, she mouthed a 'thank you' to Remus and continued eating.

¤.¸¸.·´¨»«´¨·. ¸¸.¤

"Come on Claudia, concentrate. You have to make sure you concentrate solely on what your trying to Summon" Lily said, yawning.

Claudia sighed, "I am concentrating! I just feel like I'm doing it wrong! Charms has always been my worst subject."

Lily sat up from her chair. Scattered across the room were various things, such as quills, parchment, ink, books, chairs, and even a cat. Most people had gone to bed because they were tired of ducking flying objects and loosing their quills in mid-sentence.

"Maybe that's the problem. You don't have any confidence. Charms is actually fairly easy. It's only wrist movements, concentration, and remembering the spells-"

"Is that all?" Claudia muttered sarcastically.

"-Let's try again. I at least want you to Summon something directly at you. Now, when you twirl your wand, do it in a full circle, than flick. Concentrate on what you're trying to Summon, and then say the incantation with feeling. Alright, now try."

Lily saw Claudia breathe deeply. She focused her eyes and a large feather quill across the room. "Accio Quill!" The quill leapt off the table and zoomed into Claudia's outstretched hand.

Lily started clapping "You did it! See, just have confidence in yourself!"

Claudia smiled, twirling the quill between her fingers. "Thanks Lily!" She glanced at her watch, "Sorry I have to cut this short, but I have loads more homework to do. See you tomorrow after dinner?"

Lily shook her head "Not right after dinner. I have something else I need to do. Just do your homework in the Common Room and I'll come and help you when I get back."

Claudia sat down in an armchair "Not to be rude or nosy, but what are you going to be doing?"

Lily bit her lip and smiled, "Professor McGonagall needs to speak with me." It was hard to lie, but she couldn't let the secret out.

Claudia laughed, "Alright, well I need to do my homework. Accio books!"

Lily's eyes widened. Three books flew down from the dormitories and landed on the table in front of Claudia. "Accio Parchment! Accio Quill! Accio Ink!" Once again, the items flew from the dormitories and onto the table in front of Claudia.

Lily stared at the fourth year, her mouth hanging open. "What?" Claudia asked.

"That's advanced! You made it all land in front of you! And you concentrated on what books you needed! Wow, that was amazing for just learning the charm!" Lily breathed.

Claudia stared at her homework. "R-really? I did Advanced Charms? I'm going to tell Professor Flitwick tomorrow!"

Lily smiled, "When I get back, we'll work a little more on Summoning and then start on Banishing. I'm really tired, so let's get this homework done fast."

But instead of working on homework, they talked. They talked about anything and everything. In three hours time, it seemed like they've been friends forever.

"A-and then," Lily said, gasping for breath, "Snape sat up in his bed, and I quote him, 'I don't want to have some candy Mummy! I want a toy.' It was so funny, but we couldn't laugh, or else he would know that we were there!"

Claudia was doubled over, tears streaking down her face. "How'd...gasp...did you...gasp...make...gasp...him...gasp...a girl?"

Lily shook her head laughing at the memory. "Marauders Secret! Can't say or they would kill me," Lily glanced at her watch. "Oh my gosh, its past one! We really need to finish our homework. Let's go to our rooms." Lily used her wand to round up all of her homework.

Claudia nodded, still giggling a little. "Okay, see you tomorrow."

Lily smiled and waved as Claudia made her way to her dormitories.

¤.¸¸.·´¨»«´¨·. ¸¸.¤

"Alright, after dinner we will all go down to Marauder's Headquarters and start the preparation for Mission Mix-Up" Sirius said. Everyone nodded and continued eating. They couldn't talk about it much in front of everyone else.

"Hey Lily!" called a voice. Lily looked up to see Claudia walking towards her.

"Hey Claudia! Want to sit with me today?" Lily asked.

Claudia shook her head "Can't, I'm sitting with Lauren Hallerud. We're going to go over our potions homework due today. I just wanted to tell you what I did after we went to bed last night!"

"What'd you do?"

"I mastered Summoning! I realized how simplistic it was. After I mastered the wand movement, I just kept concentrating on what I wanted and pretty soon I was having everything fly right into my hand! I woke some of the other girls in my dorm up, though. Anyways, thought I'd tell you so that tonight we could start on Banishing."

Lily smiled "That's awesome! I'll see you later on tonight!"

Claudia nodded and waved as she walked away. James leaned forward. "So tutoring won't interfere with Mission Mix-Up, will it?"

Lily shook her head "No, I told her I have to help Professor McGonagall with something, then I'd be back. Don't worry, this will go perfectly."

¤.¸¸.·´¨»«´¨·. ¸¸.¤

Remus tapped three bricks on the wall with his wand and then put his hand in the middle of the dent. A black tunnel appeared and they all stepped inside.

"Wow," breathed Marissa. "How'd you do that?"

"My older cousin told me about it. He turned werewolf in his 7th year. Madame Pomfrey led him down here so he could do his transformations. Only a werewolf can access this passageway," Remus said. Marissa grinned and looked around the tunnel.

"There's a room farther ahead. We all spent a load of time decorating it," Lily said.

When they reached Marauder Headquarters, Marissa gasped in surprise. "This is so cool! How did you guys get everything?"

"We conjured it. Then the Amazing Lily decorated it" James said, putting an arm around Lily's shoulders. "We need to get to work. Grab the potion and the hairs. We need to head down to the kitchens and put the Polyjuice Potion in the goblets for breakfast tomorrow."

They made their way down to the kitchens under the Invisibility cloak. They finally got to a large painting of a bowl of fruit. James tickled the pear, which giggled and produced a green door handle. They opened the door and walked inside.

"Good evening sirs and misses! How may Tippy be serving you?" squeaked a house elf.

Lily and Marissa stepped forward. Lily smiled sweetly and Marissa started talking. "Well, we wanted to help all of our friends. You see, they are a little sad right now. We thought we would make a potion to make them feel better. So we were going to put this potion," Mara pointed to the cauldron Sirius and James were holding, "in our friends goblets."

Lily nodded. "We were wondering if you would help us."

The house elf nodded eagerly "Yes of course sirs and misses! Tippy would be happy to help you!"

Lily stepped back and put a charm on the potion to make it look like Pumpkin juice. Marissa started talking "We need to put the potion in everyone's goblets for tomorrow at breakfast. Then we need to add a hair to each one to make the potion complete."

Tippy nodded again. "Put it in these goblets on the tables! They are the same as in the Great Hall! Good luck sirs and misses!" Tippy flounced over to the other house elves that were cleaning dishes from dinner.

"Yes! That was too easy! Come on, we better hurry," James said. They started adding the potion to all the goblets. Then they added various hairs to each one. They left six of them at the Gryffindor table without hairs.

When they finished, they went over to the six hairless potions. "Who wants to be who?" Marissa asked.

"I want to be Lily!" said James.

"Then I want to be James," said Lily.

Sirius rolled his eyes "I want to be Remus!" he called.

Marissa pouted "No I wanted to be Remus!"

"Too bad, I'm Remus!"

Remus stepped in, "I'm glad everyone loves me so much, but I get to pick! And I have an idea. Marissa will be Sirius. Sirius will be Marissa. Then me and Peter will stay the same."

Lily grinned. "So then Mara and I will be Sirius and James and James and Sirius will be Marissa and I. But why don't you and Peter swap?"

Remus shrugged "Dunno it would be different. We have to get to the Great Hall before anyone else. We'll put the hairs in the potion tomorrow."

James nodded "I wish we could do the professors. That would be awesome." He said, looking wistfully at the teachers' table.

"We tried to get the hairs but it was too hard. Come on, I still have a student to tutor," Lily said. They thanked Tippy and pulled the Invisibility Cloak around themselves. They left the kitchen and headed towards Gryffindor Tower.

¤.¸¸.·´¨»«´¨·. ¸¸.¤

"Alright, the Banishing Charm is just like the Summoning Charm, but a little harder. Remember how well you can do the Summoning Charm now," Lily said, for what she thought was the four hundredth time.

Claudia groaned. "Lily, it's impossible!"

"You said that about Summoning too! And look now you can do it perfect. Just concentrate."

They kept practicing until about nine. Somehow Claudia just couldn't master the charm. Finally Lily called it quits and went up to her dorm to do her homework.

¤.¸¸.·´¨»«´¨·. ¸¸.¤

"Hey Lils, wake up," said a soft voice. Lily felt a kiss on her cheek. She opened her eyes and saw James standing over her. Lily smiled and wrapped her arms on around his neck, pulling him on the bed.

"We gotta get down to the Great Hall. Sirius, Remus, and Peter are waking Marissa up," James said, lightly kissing her. Lily looked over his shoulder and saw Remus cast a Silencing charm on Marissa and Sirius and Peter were maneuvering a bucket of water over her head.

"Marissa is not a morning person," Lily said.

"Neither is Sirius. I turned into Prongs to wake him up by continuously poking him with my antlers. He cursed me afterwards" James said, climbing under the covers and snuggling up to her.

"Mhmmm. I wanna watch this," Lily said, turning so she was facing Marissa's bed. Sirius and Peter were tipping the water on her bed. When it hit her she jumped out of bed, her mouth open. Lily guessed she was screaming. Remus had the right idea about putting a Silencing Charm on her.

Marissa was moving her mouth, obviously yelling, but no sound came out. "I'll reverse the Silencing Charm if you promise you won't yell. It's early and we need to do the prank. You can pay us pack later. Agreed?" Remus said. Marissa nodded shortly. Remus said the counter curse and Marissa glared at him.

"You three are going to get it back so bad. Where's James?" Marissa said.

Peter shrugged "Probably snogging Lily."

"Not snogging. Cuddling," James said, pulling Lily closer. Lily giggled and turned around to kiss him.

Sirius gagged "People break it up. We have some mixing up to do!"

¤.¸¸.·´¨»«´¨·. ¸¸.¤

They rushed down to the Great Hall just as breakfast showed up on the tables. They took their seats at the end of the Great Hall where their cups were. No one else was there.

Soon the Great Hall filled with people. Hayden spotted Marissa and sat down next to her, giving her a good morning kiss. She had to distract him for a moment, which wasn't that hard to do. Peter swept his eyes over the tables. "I think everyone is here. Now?"

James nodded. Sirius, James, Remus, and Peter started casually throwing Filibuster Fireworks in various place. Then soon there was explosions and color everywhere. Then Lily, Marissa, Sirius, James, and Remus all put their wand tips together. They all whispered a few words together. Then a bright white light filled the Great Hall. Everything stopped for a moment and it was dead quiet.

There was a popping noise. People were morphing into another person in the school. When it stopped everyone looked at him or herself and started laughing. Professor McGonagall stood. Her lips were very thin and her face was turning red. "BLACK! POTTER! LUPIN! PETTIGREW! STOP THIS NOW!" she yelled.

Lily stood up, acting like James, tears rolling down her cheeks. She was laughing at Snape; he had turned into Gina Burrows, a beautiful seventh year Ravenclaw that all the guys loved. "Can't...gasp...do...gasp...it..."

"WHY NOT?" McGonagall roared.

Remus spoke; he was smiling but trying to resist the urge to laugh. "Well Professor, this spell will last a week. We can't reverse it. And I wouldn't recommend trying too. You don't know what will happen."

McGonagall turned white. "A week? B-b-but..."

Marissa nodded, acting like Sirius "A week, there's nothing we can do about it. Oh, and Professor, I think that two months of detentions will do nicely."

¤.¸¸.·´¨»«´¨·. ¸¸.¤

Author Notes: Ok NOW you can read chapter 12! )