Years later -- after her time at Hogwarts, after the war -- Remus finds Hermione in Diagon Alley, selling off her magical books and supplies. There's no way he's standing by while such a talented witch leaves the Wizarding World forever. Obviously Remus has to do something, and if that something means interfering in Hermione's romance with a stuffy Muggle solicitor, well, so much the better ...