Oh Rakina, you've done it again! Such a marvelous story. I was really drawn into the writing.
Your description of Harry's curse was terrifying. I loved Snape's assumed name (so like him to "hide in plain sight" as it were) and his profession--I've always thought his spell creating abilities were overlooked in canon and fanon. I loved the bonding and the almost easy rapport he has with everyone.
Severus and Harry were very well characterized. Snape, living a life of his own, was realistically happy, and Harry, living with the prospect of a shortened life, was heart wrenching.