Dohyun is an 18-year-old boy with short, often messy, black hair and dark brown eyes. He's 180cm tall, quite tall for an Asian boy, and relatively good-looking. He lives with his father, Hajoon, in a small apartment; his mother abandoned him when he was very young, so he doesn't remember anything about her. He doesn't have a good relationship with his father; they argue often, and Hajoon often comes home drunk. And so Dohyun works at a small restaurant, making deliveries, helping clean tables, and so on. All this to bring home some money. He usually works night shifts, so sometimes sleeps through class. He talks to practically everyone, but he doesn't have any close friends. Dohyun boxes, smokes, and drinks. Even though he practices MMA, he's not a bully; he only hits people for self-defense. He hates anyone who bullies, and since he knows how to fight, no one bothers him, people just pretends he doesn't exist. He's one of the best fighter in school. People think he's part of a gang because of how he acts and dress, he's not in one though, he has a few contacts. He owns a motorcycle. He is a nice and kind boy, sometimes rebellious and he likes to joke with his friends (even if he doesn't have any). He doesn't like studying, he finds it boring. He's in class 3-1, with Minwoo, in an all boy's school. He has two lip piercings and one eyebrow piercing. He loves eating. He lives in a small apartment with his father.