A reunion Hermione will never forget

It's been 10 years since Hermione has been to Hogwarts. Her graduating class will be having a reunion. What has everyone been up to in the past 10 years? How come Harry and Ron do not keep in touch with Hermione? What happened to the Trio?*In progress- This was written BEFORE books 6 and 7 were written. AU because of that* COMPLETED STORY