Your giftee is the luckiest person - this is perfect, in a special, fairytale kind of way. The icy theme throughout, the gradual freezing of Harry, giving the world the cold shoulder as it were, is loving described. Snape's cure, the only cure possible, replacing fridigity with warmth and loving, is never sure until the end, really keeping the reader on the edge of their seat. Harry's sunny smile at the end, and the final line, his purity, rounds it off admirably. Lovely work, mystery author!