It's told from Clint's POV, I think. Bucky is messed up in the head and ends up moving into Clint Barton's apartment (apartment building?) because Clint is the senior-most officer he could find and he wants to be given orders. Clint has no idea that it's Bucky, he just helps Bucky get back on his feet again/recover. I think maybe Steve shows up at the end (moves into the building?).
I swore I had it bookmarked, but I can't find it anywhere.
Anyone recognize the fic?