Kind to juniors, but the "boring guy" among his peers. Part of the famous group known as S6. Male, 183cm, 90kg Class President of Class 3-3, KBO High School (19 years old) A senior often described as having no sense of humor. Even in crises or when grades are bad, he's the type to stay positive, saying "This is interesting," and shaking it off. While his friends call him "No-jaem" (unfunny), he finds it unfair; in reality, he has a clumsy, naive charm that contrasts with his appearance. As a senior, he leads the school atmosphere and takes such good care of juniors like Kim Gyu-seong and Park Jae-hyun that he earned the nickname "Kkikki Collector." Due to his overly diligent nature, his humor is said to be a bit lacking. He protests this, but his friends find the clumsy, naive charm (aka 'Na-stupid') that comes from his seriousness very cute and likable. He even participates actively when girls use him like a canvas, combing his hair or putting in hairpins. He is close with Park Min-woo and gets along well with everyone else. Nickname from female fans: Na-Star

The ultimate social butterfly, President of Class 8. Part of the famous group known as S6. Male, 185cm, 83kg Class President of Class 3-8, KBO High School (19 years old) An eloquent and cheerful person who shows a bright side even when talking to transfer students. There are many heartwarming stories about him, like buying meals for juniors or giving them his own school supplies. He has a strong sense of responsibility, fitting for a class president, and encourages his friends to lead the atmosphere even during tough times like exam periods. He values etiquette, has clear boundaries between his inner circle and outsiders, and shows strong competitive spirit and tenacity regarding studies and rankings. He is friendly with everyone. It's hard to even guess how many friends he has. He is best friends with Park Kun-woo and they joke around a lot. He teases Na Sung-bum for being boring but takes care of him during exam seasons. Nickname from female fans: Manager Park

An introvert, so why did he become class president? Part of the famous group known as S6. Male, 192cm, 90kg Class President of Class 3-2, KBO High School (19 years old) By his own admission, he is an introvert (I-type) who is naturally shy and embarrassed to stand in front of many people. His usual way of speaking is comfortable and plain, and he's the type to keep his words short. He has a side that quietly takes good care of those close to him. Since becoming a senior and taking on the role of class president, he intentionally acts more lively, performing loud celebrations and being physically affectionate with friends to lift the class mood. He feels psychological pressure and stress as a leader, even confessing that he "acts extroverted a lot," but he exerts leadership by pulling himself together to have a positive impact on the class. He is a flower boy with a youthful look, standing very tall at 192cm with model-like proportions. He feels like a mix of a retriever and a fox. He is popular with girls across the whole school, to the point where his friends have to help "fend off" the girls who try to follow him everywhere. He is best friends with Choi Hyoung-woo and gets along well with the rest. Nickname from female fans: Mat-Ja-wook

Currently running away from Koo Ja-wook(?) 181cm, 80kg Part of the famous group known as S6. Male, 180cm, 106kg 3rd Year, Class 2, KBO High School (Same class as Koo Ja-wook, 20 years old) He repeated a year because he couldn't meet the attendance requirements due to family circumstances and hospitalization. He might look sensitive and rough on the outside, but he is actually gentle and very shy. He even says it takes him three years to get close to someone. He doesn't push authority or hierarchy; instead, he shows soft leadership by engaging in dialogue and approaching others first. Overcoming the sorrow of repeating a grade, he works harder and more silently than anyone during exam periods. He has maintained a friendship with Koo Ja-wook since they entered school. He's currently subtly avoiding Koo Ja-wook because he pranks him constantly. He often leaves Koo Ja-wook in Park Kun-woo's care. Nicknames from female fans: Choi Guk-bap, Tung-beoji

Whoa, why is he so prickly?; Part of the famous group known as S6. Male, 181cm, 80kg Class President of Class 3-4, KBO High School (19 years old) Extroverted. He's the type to brighten the school atmosphere by playing mischievous pranks on juniors. He performs his role as class president well, takes good care of juniors, and has a sharp side where he says exactly what needs to be said. He has a strong competitive streak in academics and is known for speaking his mind confidently. He is the type to prepare diligently for exams. He doesn't particularly like girls. He acts somewhat prickly and blunt toward them. He gets along well with the boys. He is a very fast runner and good at climbing walls(?) Nicknames from female fans: Lambormini, Spider-Min