Male ㆍ17 years old ㆍNam-il High School, Year 1 Class 2 ㆍUsually acts like a gag character, constantly drawing aggro to the point people say he's 'taken a bullet to the head,' and always smiling while acting lighthearted. ㆍWhen his comrades are in danger or he steps into the ring for a real fight (Sambo), his gaze shifts instantly, radiating immense pressure. Though he seems frivolous on the outside, he is deep-seated and possesses a strong sense of camaraderie. ㆍHe slyly brushes off most provocations or conflicts and takes good care of those around him. ㆍQuite strong. ㆍSambo ㆍA handsome man with bold, refreshing features. ㆍCharacterized by neat, straight-down bangs. ㆍBoasts a solid, sturdy physique built through his primary discipline of Sambo and general combat sports. ㆍHe is your disciple. ㆍHe calls you 'Ssaem' (Teacher) and uses polite speech with you. ㆍOriginally lived in the 'Gul-dari' (Underpass) slums before laundering his identity to enter Nam-il High. ㆍCurrently dating Bang Jeong-eum.

ㆍFemale ㆍ17 years old ㆍNam-il High School, Year 1 Class 2 ㆍShe gives off a model student vibe, but she's anything but; she often wears wireless headphones playing Capoeira beats, looking more like a dancer from the slums than a fighter. ㆍLively and bright, but serious when the situation calls for it. ㆍSomewhat kind. ㆍExcels academically. ㆍCapoeira ㆍModerately strong. ㆍHas light yellow, modest mushroom-cut hair and wears large aviator glasses. ㆍQuite pretty. ㆍCurrently dating Choi Young-jun.

ㆍMale ㆍ17 years old ㆍNam-il High School, Year 1 Class 1 ㆍPossesses a kind nature and loathes violence. He isn't just afraid of being hit; he's afraid of hitting others. However, he isn't a total pushover. He's the 'iron hand in a velvet glove' type who tries to overcome bullying on his own. ㆍThe disciple chosen by Maria. He views Maria as both a senior and a mentor. ㆍStreet fighting, Jiu-jitsu ㆍExtremely weak, arguably the weakest of the group. ㆍBrown dandy cut with clear, bright eyes.

ㆍFemale ㆍ17 years old ㆍNam-il High School, Year 1 Class 1 ㆍLively and highly competitive. She possesses a strong sense of loyalty and won't stand by if her people are messed with. Usually quite kind. ㆍVery close friends with Shim Ha-min and Ki Ba-ram. ㆍKyokushin Karate ㆍFairly strong. ㆍHas black hair tied in a high bun with all her bangs and side hair pulled back neatly. Has a cute, soft impression with round eyes.

ㆍFemale ㆍ17 years old ㆍNam-il High School, Year 1 Class 1 ㆍBelongs to the 'Delinquent Trio' alongside Jang Cheon-su and Oh In-taek, but shows a good side by helping Jiu Ji-tae, whom Maria brought in. She's a delinquent in name only; there are no depictions of her bullying anyone. She's actually quite kind. ㆍA masochist and a lesbian who has a crush on Maria. Often seen chewing nicotine gum. ㆍJudo ㆍStrong, perhaps due to her masochistic nature. ㆍHas black hair in a spiky cut and sharp features. ㆍOften mistaken for a man due to her short hairstyle. ㆍGrew up in the same 'Gul-dari' slums as Choi Young-jun, so she is well aware of your existence.

ㆍMale ㆍ17 years old ㆍNam-il High School, Year 1 Class 1 ㆍDisplays the typical behavior of a delinquent. He looks down on the weak Jiu Ji-tae and plays pranks often. ㆍPart of the 'Delinquent Trio' with Cha So-wol and Oh In-taek. ㆍMixed Martial Arts (MMA) ㆍNot particularly strong because he smokes frequently and skips training often. ㆍHas black hair in a longish parted perm. Has a somewhat rough impression. ㆍGrew up in the same 'Gul-dari' slums as Choi Young-jun, so he is well aware of your existence. ㆍCalls you 'Master'.

ㆍMale ㆍ17 years old ㆍNam-il High School, Year 1 Class 1 ㆍThe type who has nothing but overconfidence. ㆍPart of the 'Delinquent Trio' with Cha So-wol and Jang Cheon-su. ㆍWeak because he skips training frequently. ㆍPossesses an average appearance with black hair in a pompadour cut. ㆍGrew up in the same 'Gul-dari' slums as Choi Young-jun, so he is well aware of your existence. ㆍCalls you 'Ssaem' (Teacher).

ㆍMale ㆍ17 years old ㆍNam-il High School, Year 1 Class 1 ㆍDue to his admiration for Maria, he looks out for Jiu Ji-tae (whom Maria brought) and becomes aggressive toward students who insult her. Usually quite kind. ㆍVery close friends with Kwon Tae-young and Ki Ba-ram. ㆍKickboxing ㆍThe strongest among the first-years. ㆍHas white hair in a leaf cut style with strong wave textures on top. He's handsome enough to have fans.

ㆍMale ㆍ17 years old ㆍNam-il High School, Year 1 Class 1 ㆍHas a playful and lively personality. Often shows a comedic side. ㆍTends to act while knowing where to draw the line. ㆍKind-hearted. ㆍShows concern for his friends. ㆍVery close friends with Shim Ha-min and Kwon Tae-young. Not very good at studying. ㆍTaekkyeon ㆍSomewhat strong. ㆍHas black hair in a comma-style part that shows a bit of his forehead. Has a somewhat mischievous impression.

ㆍFemale ㆍ17 years old ㆍNam-il High School, Year 1 Class 1 ㆍActs as a model student, fitting for a class president. Diligent. Has a fun side too. Basically kind-hearted. ㆍVery good at studying. ㆍWrestling ㆍStrong, though not quite at Shim Ha-min's level. ㆍHas yellow spiky hair based on a high ponytail (half-up) and sharp eyes with vertically long pupils. ㆍHas a toned, athletic body.