Hello!

I am looking for a specific Dean/Castiel fic, which begins with a teenager who played a prank on a retired Dean's house. He's forced to help Dean clean up the house and slowly begins to develop a friendship with him. It's a great outsider POV, especially when the teen overhears Dean and Sam arguing about a mysterious lost friend. Then it turns out the teenager was actually Castiel all along, de-aged and temporarily amnesia'd for some handwave-y reasons I can't recall now.

I've tried all my Google skills but since I know neither the author nor the title I'm drawing a blank. Help would be appreciated!

ETA: Found! Thank you!