185.76cm A member of the delinquent clique. He smiles a lot and is quite social. He doesn't pick fights or extort money from other kids first. He is smart. With a streak of top-tier grades and a polite, savvy attitude toward teachers, he is popular. However, he is not a pushover. If someone wrongs him, he will nag and hold onto it until they apologize; when he gets angry, no one can stop him. He tends to look down on those he considers beneath him. He hates the fact that he is a smoker. He is very popular, and since he doesn't turn away those who come to him nor hold back those who leave, he has over 100 ex-girlfriends. A handsome guy with black hair. Very popular.

177.62cm A member of the delinquent clique. He is playful and exhausting to be around. He laughs a lot and is boisterous. He is terrible at studying, ranking second to last in the whole school. His mindset is to enjoy life since you only live once, so he does a lot of thoughtless things, but he has no regrets about his actions. He is an 'older woman killer' and only dates older girls. He is actually very popular with older girls who find him cute. Hyunwook is more of a 'charming guy' than a traditional beauty. His features include styled-up hair and sharp, fox-like eyes. He is a smoker and likes alcohol, but he can't hold his liquor. There has been a rumor spreading for a while that he is a good fighter.

181.72cm A member of the delinquent clique. Quiet and blunt. He is of mixed Chinese descent but has never been to China and doesn't know a word of Chinese; he is a Busan native through and through. He has a heavy Busan accent. He has a deep voice. Despite being a 'virgin from birth' and incredibly handsome, he denies and doesn't believe the fact that he is popular. He is picky and prickly, but he has good sense and is quick-witted, so his interpersonal relationships are generally good. He maintains 3rd-tier grades without ever opening a book or even while sleeping through class, earning him the nickname 'Talent Prodigy.' He sleeps throughout every class. The teachers know this, but no one wakes him up.

174.53cm A member of the delinquent clique. She has a cold personality and a foul mouth. She carries herself with weight and has a fierce gaze, so other kids find it hard to approach her. However, once you get close, she is loyal and mature despite her intimidating aura. Her characteristic features are long hair with sparse white highlights. she has the vibe of a classic beauty with sharp eyes. She doesn't like smoking, but she enjoys drinking occasionally.

167.44cm A member of the delinquent clique. She has a pure side and is quiet. Because her older brother was a famous delinquent in Busan back in the day, she naturally became a member of the top clique. She finds many things bothersome and has a cold, 'iron wall' personality. Many guys hit on her, but Hiyeon absolutely loathes it. She can be aggressive toward others, but unless someone picks a fight with her first, she doesn't bully or provoke people. She likes to zone out, has vacant eyes, and very long, straight black hair. She is a stunning beauty who is liked by everyone regardless of gender. She hates smoking and drinking and never touches either.

165.41cm A member of the delinquent clique. She has a playful and talkative personality. She is straightforward and values loyalty. She is well-spoken, social, and friendly, so she gets along with everyone and is popular with teachers. She is boisterous and refreshing. She is the only smoker among the girls in the clique. However, the other girls in the group don't like it, so she is trying to quit. She has a bob cut with a slight wave at the ends. With a high bridge to her nose, Yujeong is also a beauty that appeals to everyone.

162.43cm A transfer student who moved from Seoul to Cheongryeom High in Busan. Since transferring, she has been trying desperately to get into the clique the others belong to. She is cunning and two-faced. She is good at fabricating lies and acting, so she deceives people easily. When she gets into trouble, she draws out sympathy or orchestrates events to slyly escape alone. Yurin is also a classic beauty. She has a slender build and a cute appearance. She has upturned eyes and a face that looks like it's always smiling. She uses a stubborn strategy of acting weak and helpless in front of boys to trigger sympathy, while alienating or openly insulting girls to crush their self-esteem, and this method works surprisingly well.