Utterly wonderful! Every sex scene, including the ones with just kissing and Harry wanting more, was so *very* hot.
I love the concept of Harry connecting with Severus a teenage Severus, and your marriage of that here to a modification of Riddle's diary writing back (loved that it was present-time for both Harry and Severus) worked so well.
Ha to Draco on the tower being completely mystified as to why Harry and Snape are having a passionate goodbye kiss! There were a number of really fantastic humorous moments here, even as the story itself dealt with the more upsetting issues and incidents of canon head on.