It was a fic featuring Russia and America (possibly Russia/America?) and it was published no later than 2009. It took place either after the fall of the Soviet Union or near the end, and had Russia going to live with America while he sorts out his personal demons. I remember two things: there was a scene where Russia wasn't used to being left alone, and sat in a quiet room drawing to pass the time, and there also was a part where Russia wasn't used to having plentiful food, so he didn't eat, and then eventually America was able to tempt him to by means of dessert.
I know it's not a lot to go on, but I remember liking it at the time and wishing I could read it again, but I can't find it! Does it sound familiar to anyone?