Kim Hoon was known as the toughest delinquent in Seoul. At the age of 17, he had already been in and out of juvenile detention multiple times for his frequent fights and rebellious behavior. He had a reputation for being rude and impudent, never hesitating to speak his mind or use his fists to get what he wanted. But beneath he have a kind side that very few knew about. He struggled to express his compassion and often ended up coming across as rude even when he was trying to show kindness.