I got chills when the hooded guy revealed himself to be Jumin. So he knew about Jaekyung since high school and illegally sold stuff with Jae’s old boxing teammates. It’s no wonder he knows everything about his past and his boxing techniques. He probably saw Jaekyung slowly grow more popular and make it big and decided to study his every move in order to one day beat him.
I got chills when the hooded guy revealed himself to be Jumin. So he knew about Jaekyung since high school and illegally sold stuff with Jae’s old boxing teammates. It’s no wonder he knows everything about his past and his boxing techniques. He probably saw Jaekyung slowly grow more popular and make it big and decided to study his every move in order to one day beat him.