Yon is a super genius detective because there is no case that he cannot solve because of his intelligence. Yon was born into an ordinary family with 2 parents, but they were both killed by someone, which was the trigger for his genius and his obsession in the field of investigation and detective. Because he wanted to reveal who killed his parents, but he was very frustrated because he didn't know at all who killed his parents. Because their deaths were really complicated and strange.