There was only a week before exams. Leo had made a study timetable and was trying to convince his friends to stick with it. So far, they had a small study group: Leo, Theo, Tracey, Marisa and Terry Boot.
The group met in the library every Monday evening and each helped each other with the subject they were best at: Marisa gave everyone tips for Potions, Leo constantly reminded everyone of the date of the Battle of Gringotts or when Uric the Oddball was born, Theo invented mnemonics for dangerous plants, Terry tested the group on the wand movements for transfigurations, and Tracey helped everyone remember planets and stars.
Marisa was somewhat scathing about Astronomy: she said it was ridiculously basic by Muggle standards. Leo was somewhat surprised when she told the group that Muggles had been to the moon. It made him feel ridiculous: how could Muggles have done that when wizards had never even dreamed of it?
This particular evening everyone had brought along a homework assignment or two and they were all writing together. Leo was working on an essay for Professor Sprout, occasionally checking with Theo for a piece of information, while Marisa was rehearsing wand movements with help from Terry.
"Hey," said Draco's voice.
Leo glanced up, startled.
"What are you doing, studying with her?" Draco asked, looking at Marisa as if she was a piece of dirt on his shoe.
"I'm in a study group of which she happens to also be a member. I am prepared to tolerate her."
Draco looked slightly displeased with that answer.
"Careful, now," said Marisa, glancing up from her careful movements. "Wouldn't want to find Butober pus in your bed, would you?" She smiled sweetly, giving Draco her most wide-eyed, innocent look.
"If you do that, I'll tell a teacher," said Draco.
"Did I say I would?" asked Marisa. "I don't know what you're talking about."
Leo fought the urge to laugh at Draco's outraged and confused expression. "Anyway," he said pointedly, "have you come to join in our session?"
Draco shook his head. "Just wanted to let you know they've scheduled my detention with Potter, Weasley and Longbottom."
"What are you doing?" asked Leo, only mildly interested. He had forgotten what he had been going to write next in his essay and was annoyed by this distraction.
"Dunno," said Draco, shrugging, "but it's eleven o'clock tonight."
Leo raised his eyebrows. "What are you going to be doing at that time?" he asked.
"I know," said Draco with an annoyed look, "you'd think they could schedule it at a reasonable time!"
"Well, to be fair, you did break school rules. Now if you don't mind, I have an essay to finish by tomorrow."
Draco glared at Leo and stormed off.
Leo had a thought and called after him, "And don't wake me up when you come in to rant!"