I have searched all over, and my googlefu has forsaken me. If anybody could point me in the right direction?

Details:
Pairing: Dean/Cas
Dean is a mechanic, and bartends, or helps out at Ellen's Roadhouse, because Pie.
Cas is a history teacher at a high school, but apparently well known, if slightly disgraced, in academic circles for some apparently risque interpretations of theological texts.
Dean moves in down the street from Cas, bumps him with his car, and it all sort of snowballs from there.
Sam stays with Dean in summer, and in the end they get a dog named Misha.

I found a tumblr post with a quote, but i wasn't able to find the actual fic. It was fairly long and I think on AO3, but I can't be positive.

Any help is super appreciated.