Gabriel and Castiel sat outside the principal's office, waiting to meet with him on their first day. Gabriel was starting to get impatient, his leg jiggling and irritating his brother. The door finally opened, revealing an irritated teen, probably a senior like Gabriel, and the principal.
"You can wait out here and show our new students to their classrooms when we're done," the principal informed the young man, who dropped into a chair, grinning.
"Sure thing, Chuck," he replied, sprawling out like he owned the place.
"Dean," the principal warned, giving him a stern look. He didn't wait for a reply, ushering the brothers into his office to discuss their timetables and such. Castiel glanced back as the door was closed behind him, catching the wink Dean threw him, still grinning.
The meeting didn't take long, but Castiel decided quickly that he liked Mr. Shurley; he was friendly, and seemed to genuinely care about his school and students. That much was evident in the look of fond exasperation he shot Dean when they left the office to find him practically laying across the seats, apparently bored.
"Alright boys, get to class," Mr. Shurley instructed. "Dean, please try not to cause any more trouble today."
Dean just chuckled and led the brothers down the empty hallways, pointing out important places (cafeteria, nurse's office, gym), before pointing out the rooms that their classes were in. Gabe was the first to be dropped off, with a smug grin and a 'have fun'.
Dean left Castiel at his classroom next, before waltzing off in the opposite direction, humming 'Welcome to the Jungle' to himself.
Castiel had expected that to be the one and only time he interacted with Dean Winchester. He hadn't counted on Gabriel being determined to make friends with the first troublemaker he met. It should have been expected, but Castiel had been too preoccupied with nervous panicking that morning to give much thought to his brother's antics.