Always is Forever

What if Snape survived Nagini's attack? What if he was just in a coma while Hogwarts was being rebuilt? There is a French transfer that has been the new Potions Mistress while Snape was out cold. And if this Mistress had been taking care of Snape in his vulnerable state, how will he treat her? When Snape wakes up, will he find something bright in the cruel world he once knew?