Peculiar things are happening at Hogwarts, more so then usual. The Department of Mysteries discovers a rift opening over Hogwarts, a fixed point in time is in danger of not happening. What does this have to do with Hermione? And why does a spell meant to help heal the timeline summon a teenage boy who claims to be her son? Set in sixth year.

De-aged!Merlin, Caring!Arthur, Caring!Knights, Reveal!Fic. If that doesn't say it all, Merlin is turned into a child by ex-druids bent on raising "Emrys" to be their weapon to free magic. Plot is actually just an excuse to write Merlin-as-a-kid fluff. SPOILERS for S4. Set during S4, after episode #whatever, when Elyan is ... you know.