Byun Harin fell in love Kim Minjun when she shouldn't have. Minjun wasn't ready to settle down or have kids. He enjoyed the bachelor life, but he also really loved to have sex with Harin. That ass knocked her up and out came a sweet baby girl named Haeun. Minjun wasn't sure if he wanted to stay with them because of the heavy responsibility, so he was in and out of their lives. Despite being in and out, Minjun's pull out game was shit because a year later another baby was born. This one was a baby boy named Kijung. Once again, Minjun wasn't very constant in the small family's life. He eventually decided it was too much and those rare visits became nonexistent. Haeun only remembers bits and pieces of her father, while Kijung hardly recalled anything about the man. He wasn't really talked about much. That was okay though - the three of them got by fine enough and Harin loved her babies with the strength of a million parents so it didn't matter too much that he was gone.
Around age eight was when everything seemed to go to shit. Minjun showed up again claiming he wanted a second chance. Harin was dumb enough to give it to him. She became pregnant once again and as soon as Minjun found out, he bolted. At the same time, Harin lost her job and was left unemployed and needing to support three children. Her oldest kids were only eight and nine. As much as they wanted to help, they couldn't do everything. Especially Kijung. Because if Minjun and losing the job weren't enough, Kijung started experiencing some weird shit. The first time it happened was when his baby sister Subin was crying her little head off. Kijung just remembered her crying so loud and wanting it to stop. Next thing Kijung knew, a pacifier shot across the room and popped right into Subin's mouth. It was odd, but Kijung was grateful. But that wasn't the last of it.
Kijung kept doing some supernatural things that he chalked up to coincidence while his mother feared something like bad spirits. Haeun always thought he was magic. Little did they know, Haeun was right. Harin's sister had moved to London long before Haeun was even born. She lived a rather English life despite being born in Korea. She went by Molly and spoke all proper - at least that's how it sounded to Kijung. When Harin lost her job and Subin had been born, Molly came to the rescue. She moved the family to London to be with her and took time off work to help care for the kids. When she realized what was happening with Kijung, Molly was able to help with that too.
Though Molly herself wasn't magic, she knew a wizard. In fact, he was a muggle studies scholar who used Molly as a reference. He was able to tell Kijung about the magic world that was only a stone throw away from his own, and when he was eleven, Kijung received his letter to Hogwarts. By then, Kijung was relatively accustomed to England and the differences between it and Korea. He even had his own English name. He got it from watching the old Christmas movie about the outcasted reindeer - Rudolph. Of course Molly wouldn't let him use that (social suicide was not on the to-do list), but Rudy would do right nice.
Now fully introduced to the world of magic, Rudy is able to embrace that part of himself. It's still weird for his muggle family sometimes, but they are pretty used to magic now too. As much as Rudy loves his family and being with them, he can't help but love Hogwarts too. Maybe coming from a boring life like his into a world of fantasy and magic was what drew him to loving school, but regardless of the reason, he loved it there. Unfortunately, he loved the social aspect of it the most while his studies fell somewhere behind on the priority list. Finding the motivation to study was a real chore.
After graduation, Rudy didn't really know what to do. It seemed everyone had their lives figured out. His friends went on to do great things, and Rudy was just... stuck. He didn't know what he wanted. He wasn't particularly good at anything. What was next? Rudy traveled around a bit trying to find his way, but he still isn't sure what he wants to do with his life. Now he's just in limbo trying to fit into a world that seems to be moving on without him.