Detention with Filch.
"Well, that was a flop. At least it was fun!"
"Of all teachers, it had to be Mcgonagall." Sirius Black moaned as he polished the trophy in his hands. The Marauders are currently serving detention with Argus Filch, the caretaker of Hogwarts, polishing every single trophy in the Trophy Room. He glanced down at the trophy, Winners of the Inter-house quidditch cup in 1871 with the Slytherin crest embellished on the metal. Nearly every Inter-house cup was won by Slytherins in the past two centuries. He sighed as he turned to look at his best friends, polishing trophies half-heartedly around the room.
"I told you it was a bad idea."
"Oh come on, Remus! It was an innovative idea! No one at Hogwarts would ever thought of riding on their beds throughout the castle. With the help of a first-year levitating charm, no less." James Potter exclaimed loudly before lowering his voice when Filch hushed them rudely before muttering under his breath.
"No talking during detention! If I were to set the punishments, you boys would be dangling from a wall by your ankles."
"Thank god you're not then."
"What was that, boy?!"
"Nothing, Mr. Filch."
Remus Lupin, the lone prefect of the group rolled his eyes at James' exclamation. He whispered back, "Riding on a flying bed, exploring the castle isn't the best explanation when caught." Peter Pettigrew, who had silently polished a quarter of the room, piped in, "There was no rule in the student handbook about moving around the castle on a floating bed though."
"Thank you Peter! I'll have you know I did research on this."
"I bet there'll be one now."
"QUIET!"
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"Man, am I glad that detention was over and done with. The smell was getting to me." Sirius wiped his nose on a handkerchief.
"Oh yeah?" James raised his eyebrows at the Black heir, "What about Moony? I doubt his senses weren't affected." Remus waved them off as he plopped down on an armchair. They were back in the Gryffindor Common Room after finishing their detention, with aching arms and numb hands from all the polishing done. "I'm fine guys."
"Who knew there were so many trophies in that room?"
Sirius threw himself on a nearby loveseat, exhausted from the work he'd done in detention. He stared at James and Peter, making themselves comfortable on the carpet by the fire.
"I've been wondering…"
"What about, Peter?"
"Was there ever a map of Hogwarts that only teachers are able to access?"
The other members of the Marauders pondered the rat animagus' words. If the professors have that, it would certainly be harder for them to not get caught when pulling pranks or going on adventures. What if they could create a map of Hogwarts that shows every single person in the castle? James grinned as his eyes shone with excitement.
"Padfoot, Moony, Wormtail…"
"Yes Prongs?"
"I just came up with another idea for our upcoming adventure."
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15 years later...
Harry Potter frowned as he read through his copy of the student handbook. "Hey Ron," he called his best friend, "Why would there be a rule on flying beds in the corridors?"
"Who knows, Harry. It certainly wasn't Fred and George. Mum would've received a letter by now if it were them."
"How did they manage to get it out of the dormitories is what I want to know." Mused Hermione Granger, the bushy haired friend of the Boy Who Lived. She looked over his shoulder, reading the rule before chuckling softly. It reminded her of the muggle fairy tale she used to read about a boy who stumbled across a genie and a magic flying carpet.
"We could always search in Filch's office for any detention documents about flying beds."
"Hermione, you're a genius!"
Here's the follow up chapter to the first story. I really wanted to show Harry finding the existence of the rule because why not? XD If you readers want to see how Harry, Ron and Hermione figure out who made that rule exist in the first place, just let me know. I'll probably publish it as a one-shot if anyone's interested. Thanks to Raven that flies at night reviewing! And Sadowhanter as honourable mention! Happy reading!