Best Birthday Ever
Hogwarts is home to many. A sanctuary. A place one can return to year after year and just be themselves. Away from familial and societal expectations. Or so first-year Gryffindor Jeon Jungkook has been told.
Spoiler: he doesn't agree.
Jungkook's first encounter with the magical world was on his sixth birthday and if anyone had been kind enough to have asked him how he'd felt, he would wholeheartedly say that it was the most terrifying moment in his life to date. Second to that would be the time he poured tea for his granddad and it turned into frog eggs and had to spend a full half hour trying to stop the old man from drinking from the cursed cup.
His parents had decided that a day out in London would be the "best birthday present ever" and Jungkook had, of course, very much agreed. So excited to ride the London Eye and visit the London Aquarium, Jungkook bolted ahead of his parents as soon as they stepped out of the train at King's Cross Station, which in hindsight was very stupid of him as a) he was separating himself from his parents in a very crowded place which b) happens to be somewhere new and unfamiliar to the just-turned-six-year-old, not to mention that c) they were supposed to get the underground and not get out of the station like Jungkook tried to do. He'd turned around at some point, to see if his parents had followed him, and ran back towards platform 10 when he realized that no, they weren't following just behind him like they usually do.
He'd been running, close to tears and disoriented, mentally congratulating himself for dodging that tall man with the green cape for about a second until he realized that by dodging the man, he'd put himself right in front of a wall.
Too late to stop.
Too late to change direction.
Jungkook closed his eyes, hand stretched out, and braced for impact.
He burst into tears as pain shot through his arm and his side where his own elbow, the traitor, had lodged itself. Stinging on his knees where he'd apparently scraped himself but as he opened his eyes, Jungkook couldn't find the wall he'd just bumped into. Instead, there were crowds of adults and children and a massive red train he was sure wasn't on the platform a second ago because he definitely would have noticed. He blinked, pain forgotten for a few seconds of confusion. And then he cried. Cried because he missed his parents. Cried because he was in pain. Cried because he didn't know what was going on and where this stranger lady with a long purple cape was taking him.
He doesn't actually remember anything else after that. His parents had told him that someone took him to the concierge where they then found him and then had apparently spent the rest of the day enjoying what his parents had planned. Jungkook doesn't remember.
After that, a series of unwanted events started to happen around him that remained mostly unexplained for the next five years up until a man in green showed up to their house about a month before his eleventh birthday claiming to be a wizard and offering 'education'. His mother had been delighted, a wizard in her family (she'd explained that she used to have a best friend who came out as a witch --> she's dead now but kook doesn't need to know that), and his father had let out a relieved "oh is that all?" (his dad, a professor who specializes in mythical Lore, was sure Kook was a changeling, taken on his sixth birthday).