The Kang Clan is a family of very wealthy South Koreans that acquired their money though questionable means. No one knows how they came to their wealth, but no one bothers to question the powerful tycoons. It's still a mystery, but most believe the family makes up its own mob. Kang Taejong, one of the younger Kangs, took a different route with his money and set up a successful clubbing chain, Seesaw Clubs. It was at one of these clubs that he met Anastasia Maverick, sister to the CEO Arlon Maverick of the infamous Euphoria Corporation. She was not wealthy like her brother, but her personality more than made up for it. The spunky girl from America stole his heart and soon became part of the Kang Clan herself.
A few years down the road, Anastasia became pregnant with triplet boys. Wanting to commemorate all the cities where she and Taejong had their first milestones (first date, first kiss, and engagement), she named the three boys Daegu, Seoul, and Daejeon. The trio grew up inseparable. They did everything together. They still fought and argued of course, but they'd also kill anyone who dared do the same to one of them.
Daejeon was a good kid from the start and remained that way throughout his childhood. While his brothers were off mixing with the wrong crowd, Daejeon was home practicing flute or working on his art. He didn't make friends easily because he got hurt too much because of his emotions, and he was too scared to do things with his brothers because he didn't want to get hurt or have them get mad at him.
Of course that meant that he was secluded and alone most of the time, which he didn't mind because he grew used to it. His parents sent him to school to try and have him socialize, and while it helped it only made him want to be home more. He joined a small group of performers because of his flute skills, and made a few close friends there.
When he was 7 his first sign of magic appeared when he was fighting with his brothers. He was so sad and hurt that he was crying so loudly, and in his sadness he made all the windows shatter to get them to stop. He was surprised as were his parents, but they were glad that he had magical abilities.
When he received news that he would be going to Hogwarts he was quite nervous, but his parents told him that him and his brothers would be together and they'd be fine. He's been doing well in Hogwarts so far, and he's mostly trying to survive and get through school.