Misunderstood
"C'mon, I have to go!" whined Scorpius, hopping up and down.
"Be quiet, I'm trying," hissed Albus, squinting down at the Marauder's Map. He'd nicked it from James, who had nicked it from their dad's desk, so it didn't count as nicking, did it? They had been looking for the Room of Requirement but after walking in circles for half an hour, all they had to show for their efforts was Scorpius's full bladder.
"Oh no - there's Peeves!" whispered Scorpius, pointing at the Poltegerist zooming closer.
"Let's hide, quick!" Albus grabbed Scorpius and pulled him into the first door he saw. If only he had the Cloak too! But Dad still had it and Albus knew he'd never get it if he ASKED for it... because James asked for it almost everyday to no avail.
"Hey," said Scorpius, looking around. "It's a loo."
Indeed they were in what appeared to be a lavatory. "Wait," said Albus, comprehension dawning on him. He whirled on Scorpius excitedly. "Scorp - this is it! It's the Room of Requirement!"
Scorpius's eyes grew wide. "REALLY?"
"Yes! You wanted to pee, didn't you? My dad told me a story about how once Dumbeldore needed to go to the loo in the middle of the night and, and he walked into a room with a bunch of toilets - and that was the Room of Requirement!"
"WE FOUND THE ROOM OF REQUIREMENT, WE FOUND THE ROOM OF REQUIREMENT!"
They were so busy whooping and dancing around that they didn't hear one of the bathroom stall doors creaking open.
"Oh, oh... I knew you'd come back someday!"
Scorpius and Albus stopped jumping.
"Who... are you?" asked Albus slowly.
"Harry - you've forgotten me? How mean of you! And - oh, Draco! Why did you wait this long to visit me? I've been so lonely without you!"
"I'm not - " began Scorpius.
"MOANING MYRTLE HAS MISSED YOU TWO SO, SOOOO MUCH!"
With a swoop the bespectacled ghost of 2nd Floor Girls' Bathroom flew towards "Harry" and "Draco," crying tears of passion and longing.
The whole castle was awakened that night by the shrieks of two very frightened boys and a very heartbroken spirit screaming, "WHY ARE YOU RUNNING AWAY? COME BAAAAAACK! IT'S YOUR CUTE LITTLE MYRTLE!"