The Once and Future King

It's been thousands of years since Merlin last laid eyes on Arthur. He has been trying to cope with everything that's happened and it's taken him this long to get over it. Looking for a way to be rid of it forever, Merlin becomes a professor at the University of Cambridge. There he meets a student named Arthur Daniel Pendragon. This student and Arthur are too much alike for it to be coincidence. After Merlin discovers Arthur's abusive boyfriend, Merlin takes hi student under his wing. How will Merlin ever get over his feelings now, and what relations will grow between this student and teacher?