I read this fic a couple of days ago and I thought I found it roaming around this community, but I didn't bookmark and now I can't find it. It's Dean/Castiel, set after 6.07, and features angry wall!sex. The entire story, I think, is angry, really hot sex, and maybe a little "why didn't you stay?" and "why didn't you ask me?" Does that sound remotely familiar to anyone?