A change of situation could mean a change for everything. 12 years after the final battle, Hermione comes back to Hogwarts with secrets. But everything slowly changes. SS/HG romance, mean Ron, EWE, non-canon compliant, and lots of other details changed because it's my story and I can do that.
"Deeper than that, she not only has to trust me, she has to believe that there is good in me worth having faith in. And that, I cannot help her with. She is destined to recede into the shadows." Can Snape save this bitter Hermione Granger?