Remus Lupin had chocolate.
He ate far too much chocolate to be so skinny, in Sirius's opinion. James's, too, and probably Peter's if the boy could notice.
Lupin was about fifty percent bones, or at least he looked it. But one thing was certain: the pale-haired boy in the thick nubby jumper had a whole lot of chocolate.
Sirius planned to steal it.
He knew where Lupin kept it, of course. That much he found out pretty easily. The hard part was actually getting the candy to his mouth, down his throat, and into his stomach.
That sounded a bit gross, actually, if you put it that way. But he and James, and he supposed Peter too, were going to get it.
He didn't really know why. It wasn't like they really wanted it, because James or Peter could just get their parents to send some, or they could order chocolate from Honeydukes. It was more that they wanted to see Lupin's reaction; to see if the pale, mild-mannered boy would get angry.
Sirius and James (and Peter, too) were sitting on the floor of their dormitory room. A crinkled piece of parchment was laid out in front of James, who was pointing at it.
"So first, we can go here, right?" James pointed at Peter's wardrobe on his parchment map of the dorm. "If Lupin is in the room then he won't be able to see us. And if he does spit us, then we'll go outside. If he doesn't see us, then we proceed to step two."
James grinned manically. He couldn't wait to steal Lupin's chocolate. Why? He didn't really know why. But he wanted to see Lupin's reaction. That boy was far too quiet to be normal.
"Step two is: Operation Open Drawers. In OOD, we'll open all of Lupin's dresser drawers. Then take all the chocolate from them, and run. Got it, Pete?" Peter looked stunned for a moment, then answered, "Oh, yeah, of course," and nodding his head vigorously.
Peter didn't care much about stealing Lupin's chocolate, but Sirius and James seemed intent on pilfering it. Lupin seemed nice enough to Peter, if not a bit plain and shabby. But he would steal Lupin's stuff if it meant impressing James and Sirius.
"Awesome! This will go into effect tomorrow, which is September 16. Maybe after, um, Charms class. Or Potions. Lupin doesn't stop here at that time." Sirius said in satisfaction.
None of them noticed a thin, scarred boy in a thick wool jumper sitting at the other side of the door, with his left ear pressed against it.