OMG! It escapes me, at this moment, if I have ever read the fic that this is from, even though the line from it reads familiar. However, I have to go re-read it just now because I have this gorgeous pic to add to the experience. Extremely well done, 'Mystery artist'.
Just wow! I don't know what else to say. This is absolutely stunning, I love the background of Stonehenge, the position, Severus's hands cradling Harry, Harry's back, their faces, just all of it! Simply gorgeous.