Disclaimer: Just about everything here belongs to JK *-sigh-* I just get to do evil things to them :)

Summary: When a potion goes wrong and Remus Lupin becomes a five-year-old, what will the rest of Hogwarts do? Marauder-era. R&R!

Author's note: I know the plot has been used a million times, just wanted to see what I could do with it.

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Professor Slughorn whistled, his mind wandering. He was mentally going over a list of possible candidates for a little tea party he was planning on throwing soon, a vial of fresh snacklebat liver in his hand. He'd had to go to Poppy for that, he'd been fresh out, and she was the only other one in the school who might have a store of those due to their excellent medicinal properties. Yesinia Feerfallow, the Arithmacy professor, and Minerva McGonagall had both often warned him not to leave the class unattended, especially with those famous "Marauders", but he'd ignored them. After all, how much trouble could a few fifth years be? He was about to find out.

As he walked through the dungeons, approaching his classroom, he could hear muffled yelling, shrieking, and laughing. Then he was able to make out voices:

"What did you do?"
"For Merlin's sake!"
"Moony?"
"SIRIUS BLACK, YOU AND POTTER HAVE GOT TO BE THE STUPIDEST-"
"Lily, it's not like-"
"What happened?
"Is that…?"
"Huh…"
"Oh my GOD!"
"I OUGHT TO-"
"Hahahahahahahaha!"
"You've
got to be kidding me!"

Professor Slughorn quickened his pace, bursting through the door, and gasped. A giant cauldron lay on its side, its buttery-yellow contents dripping all over the floor. A crowd of students had assembled around it, whispering excitedly. Lily Evans, James Potter, Sirius Black and Peter Pettigrew were crowded around the middle. Slughorn rapidly set down the vial in his hands and impatiently pushed his way into the center of the mob, trying to see what all the fuss was about.

When he laid his eyes upon it, they grew wide, "Merlin! Is that…" A young boy stood there, probably age six or seven, gazing up with fearful, brown eyes, the sticky potion clinging to his light brown hair and now incredibly oversized robes.

"Remus Lupin," Lily finished matter-of-factly, glaring at James and Sirius; both were trying to contain their laughter.

"Tattletale," Peter grumbled.

"Hi…" the boy said shyly, before his eyes began to water.

"I… Ahem… This has never happened before… I… Oh! Miss Evans, take Lupin to the Headmaster, he'll know what to do." Lily nodded, scooping up little Remus into her arms. At first he squirmed a little, frightened, but she whispered something in his ear and he settled down.

Slughorn continued, "Black, Pettigrew, Potter, go along with Miss Evans. I suspect you three had something to do with this?" Lily groaned at the thought of those three following her, but nodded nonetheless and walked out without looking behind her.

Slughorn quickly cleaned up the mess with a wave of his wand and settled back onto his chair at the front of the class, sighing, "Indeed…"

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Short, but it's just the first chappie. Read and review please!