"I knew it," Castiel said, and laughed even louder at Dean's bewildered expression. "What? How?" And here Dean thought he'd been pretty freakin' stealthy. Cas's hair turned a bright orange and his cerulean eyes were shining as he said, "You left your spandex on your bed last night." Dean sighed and dropped his head. Nice one, Winchester. Or, the story of how Dean Winchester grows up, comes to terms with his weird (but pretty awesome) superpowers, and changes for the better. [tw for brief mentions of drugs and violence. Disclaimer: I do not own Supernatural or any of these characters.]