Oh, oh, oh. This is just. Um, wow amazing fabulous beautiful. I can't find words to describe just how much I absolutely love love love this.
The sequence of events, the slow but inevitability of it, and the soft, heart-breaking tone is just gorgeous. Love your Harry, and your Snape, the few panels towards the end make me both incredibly sad and marginally happy at the same time.
Definitely my favourite piece of the fest! :)
P.S. This was so manga-like that I started reading right-to-left for several pages before realizing that it might make more sense if I read it left-to-right. Reading too many manga scanlations do that to you. :D