It was, I believe, centered on Clint. In it he's living at the Tower but doesn't really have a lot of stuff in his apartment. He does have a painting that he just liked the look of. At some point he leaves the team for some reason and writes on the back of the painting, willing it to someone (or maybe the whole team?) I'm pretty sure there was a happy ending after that.
Like I said, pretty vague, but I've been looking for months and hope that you guys can figure it out!