Things have changed in the couple of decades since the war. Some got their happily-ever-afters, some didn't. But sometimes, you have to wait for it, and it comes from the least expected places.

Fred accidentally starts rumors that he's with Hermione, and encourages them for a laugh. When she find out, she's furious. Now the two of them are fighting to outembarrass and annoy one another... but they're also fighting their feelings for each other.