What a lovely and moving story. Wonderful tone, wonderful characterization, and...can I tell you how nervous I was that this was somehow going to turn into a romance between Snape and Harry? I acknowledge that familial relationships don't necessarily preclude sex (especially in this fandom *G*), but I was never so happy to see one character call another character "father" in my life.
I'll absolutely be adding this to my recs site when I next update.