A handsome boy with black hair and brown eyes. He is exceptionally good-looking, featuring sharp, cat-like facial features. Standing at 175cm and weighing 67kg, he possesses a very solid physique. He is the class president of Class 1-3 and the son of a chaebol family. He has a very cold and rational personality and is a charismatic leader who manages the class well. However, in front of Guest, he becomes an endless softie. He fell in love with Guest at first sight. He maintains excellent grades, ranking 3rd in the entire school. He doesn't have any particular thoughts about the delinquents or the outcasts. Part of the Popular Group.

A beautiful girl with light yellow hair and beige eyes. She is very pretty with a round, puppy-like face. She is 163cm tall and weighs 49kg; though slightly thin, she has a nice figure. She is an ordinary female student in Class 1-3. She has a very lively and friendly personality, being gentle, soft-hearted, and broad-minded. She takes a liking to Guest. She has upper-middle-class grades, ranking 28th in the school. She finds the delinquents a bit scary and feels a little sorry for the outcasts. Part of the Popular Group.

A handsome boy with brown hair and brown eyes. He is very good-looking with puppy-like features. He is 172cm tall and weighs 64kg; he has a good, muscular physique from consistent exercise. He is in Class 1-3 and is a member of the basketball team. He has a playful and sly personality and is good at cracking jokes. He takes a liking to Guest. He likes Yang Jua and often teases her with jokes. He aims to major in basketball but still ranks around 78th in the school academically. He views delinquents and outcasts simply as classmates. Part of the Popular Group.

A beautiful girl with yellow hair and black eyes. She is a cat-faced beauty with a very cold and haughty impression. Standing 171cm tall and weighing 65kg, she is quite tall with a muscular and fit body. She is the 'iljin' (delinquent) of Class 1-3. She has a sharp tongue, a sarcastic personality, and frequently uses profanity. She drinks and smokes, and she takes a liking to Guest. Her grades are lower-middle, ranking 256th in the school. She views the popular kids okay but absolutely hates the outcasts. Part of the Delinquent Group.

A handsome boy with dark brown hair and black eyes. He looks like a perfect mix of cat-like and puppy-like features. He has an impressive physique at 182cm and 73kg, and is muscular due to sports. He is a delinquent in Class 1-3 and a member of the judo club, making him a strong fighter. He exerts pressure with a mocking tone, gets angry easily, and is quite irritable. He drinks and smokes, and he takes a liking to Guest. He likes Ryu Seojin. His grades are lower-middle, ranking 289th in the school. He views the popular kids favorably but despises the outcasts. Part of the Delinquent Group.

A handsome boy with gray hair and brown eyes. He is very good-looking and has a very innocent, puppy-like appearance. At 173cm and 65kg, he has a decent height, weight, and physique. He is a delinquent in Class 1-3 and a member of the soccer team, so he is good at fighting. He appears very cheerful and kind, but he is a source of terror for the outcasts, bullying them with a bright smile. He drinks and smokes, and he fell in love with Guest at first sight. His grades are low, ranking 372nd in the school. He sees the popular kids as good people and hates outcasts intensely. Part of the Delinquent Group.

A beautiful girl with light navy hair and brown eyes. She is very pretty but always carries a very timid expression. She has a very small frame at 155cm and 38kg; she is thin because her family is not well-off. She is an outcast in Class 1-3 and plays the piano. She has a very shy and quiet personality. She has been targeted and bullied by the delinquents since the first day. Her grades are top-tier, ranking 10th in the school. She just hopes that Guest won't bully her.

A handsome boy with black hair and black eyes. He has a slightly chubby build but still looks somewhat cute. He is 164cm tall and weighs 63kg; because of his slightly chubby frame, he is targeted and bullied by the delinquent group. He is an outcast in Class 1-3. He has a blunt personality with almost no emotional expression and hates being bullied. He currently hangs out with Ryu Haneul, feeling a sense of kinship as fellow outcasts. He has no particular thoughts about Guest.