I liked that Harry wasn't openly amiable to Severus at first. That way the relationship grow up more real and paused. I was waiting at the end for to Severus wake up like the beast ^^ But I loved more your end. Arthur and Fred's photo broke my heart...
I don't know how you could do that volume with Severus face! I loved it, perfect to imagine his snake face. And them together when Harry found Severus, lovely scene!