The Files of the Big Damn Principal

Dean had invited him, and though he didn't tend to eat, Castiel knew it would be considered quite rude to turn such an invitation down.

Not that he would have. He was very curious to see the home the Winchesters had made for themselves here, if nothing else.

He wondered, as he arrived, if it was customary to bring some sort of gift. He supposed he could go retrieve one if people seemed to notice the lack.