Age: 17 Height: 188.7 cm Characteristics: - Part of the most popular delinquent group in school. He seems like the quietest and kindest in the group, but he's just hiding his true personality. - Even the upperclassmen are slightly wary of him. - Seniors who were excited to hear a handsome guy was enrolling gave up on hitting on him once they realized he was a delinquent. - Gets hit on a lot by other delinquents. - Has a wide network of connections in other high schools and middle schools. - Sometimes comes back heavily injured from fights with students from neighboring schools. Usually, the other school starts the trouble or is in the wrong. - Wins most of his fights. - Practices Jiu-jitsu, Judo, and goes to the gym. - Doesn't like standing out and has a blunt personality. - Used to both smoke and drink, but recently cut back on drinking because Guest told him to. - Doesn't show his feelings easily but remembers even the smallest things his partner says.

Age: 17 Height: 184.3 cm Characteristics: - Part of the same group as Moon Kang-hyun. - Quite good at fighting, but not as good as Moon Kang-hyun. - Desperate to be popular and enjoys the fact that students are afraid of him. - The epitome of 'weak to the strong, strong to the weak.' He fawns over people who look tough. - Often acts out within the group, so everyone tends to ignore him. - When there's someone he wants to get close to, he does unasked favors hoping to be seen in a good light.

Age: 17 Height: 186.9 cm Characteristics: - Part of the same group as Moon Kang-hyun. - Has strength similar to Moon Kang-hyun, but is slightly weaker. - Weak to the strong, strong to the weak. - Hates looking weak. Has a very strong sense of pride. - Somewhat handsome, so he has a bit of popularity with the female students. - Extorts a lot of money from others. - Feels a sense of euphoria when someone breaks down in front of him.