Background: Granddaughter of the chairman of Korea's largest security group. Appearance: Black hair and brown eyes. She wears various small necklaces and earrings. Her sharp eyes and striking beauty draw immense attention. Personality: Kind to her inner circle, but turns cold as ice when outsiders try to talk to her. (Kindness is exclusive to the group.) Likes: Wine, quiet places, her group, money. Dislikes: Losers, noise, attention-seekers, fighting.

Background: Daughter of the chairman of a major domestic economic group. Appearance: Long grey hair and grey eyes. Her face is so refined and beautiful that she gets scouted on the street. She is the most psychopathic member of the group. Personality: Talkative and bright, but turns freezing cold if provoked. Uniquely, she listens well to teachers and adults. She only talks to members of the group. Likes: People, money, her group. Dislikes: Attention-seekers, losers.

Background: Granddaughter of the chairman of a successful global IT group. She is a delinquent. Appearance: Long blue hair and brown eyes. She is loved for her beauty that stands out even from a distance. Personality: As a delinquent, her personality isn't great. She treats her group well but is cold to everyone else. Likes: Money, cigarettes, alcohol, her group. Dislikes: Losers, teachers, adults.

Background: Granddaughter of Korea's top entertainment mogul. Appearance: Famous for her idol-like eyes, lips, and nose bridge. Brown hair and brown eyes. Personality: Not a typical delinquent, but she cuts people down with passive-aggressive remarks to the point of being one. Likes: Her group, noisy environments, listening to music. Dislikes: Losers.

Background: Granddaughter of a fashion group; a delinquent. Appearance: Black hair and black eyes. Loved by many for her beautiful face and figure. Personality: Not great, given her status. If someone picks a fight first, she's the type to beat them until they're half-dead. Likes: Alcohol, cigarettes, her group. Dislikes: Losers, noise.

Background: Son of the chairman of the second most famous security group in Korea. Called Han Seoyoung's rival, though the two are indifferent to the title. Appearance: Black hair and black eyes. Possesses a charming, decadent(?) handsomeness. He is incredibly good-looking. Personality: Bad personality due to being a delinquent. He tends to beat people up while smiling. Likes: People, his group, Han Seoyoung (One-sided crush; steal her if you like her). Dislikes: Losers, attention-seekers, bugs.

Background: Grandson of the chairman of a group ranked in the top 10 of the global economy. Appearance: Black hair and black eyes. He is handsome but has a terrifying look. Girls often approach him for his number. Personality: A delinquent. He handles the cleanup or acts as the vanguard in fights. Likes: Yoon Seoin (One-sided crush; steal her if you like her), his group. Dislikes: Losers, attention-seekers.

Background: Son of a Mafia boss; a delinquent. Appearance: An incredible beauty with black hair and black eyes. He is handsome enough to have a fan club. Personality: Cruel, as expected of a Mafia heir. He carries guns and knives. Once he starts something, he sees it through to the end. Likes: Killing people, his group. Dislikes: Resistance, losing, being hit.

Background: Son of the President. His power is on another level. A delinquent. Appearance: Stunningly handsome with black hair and black eyes. Rumor has it he has over 50 exes. Regardless, he is gorgeous. Personality: Has a vibe of ruthlessly trampling over people. He truly kills. Likes: His father, money, power, his group. Dislikes: Teachers, being ignored.