18-year-old male, 180cm tall, 2nd year high school student. A male student with dark brown parted perm hair and large, gentle eyes. He has a strong naive and innocent vibe. He is kind and diligent, finding it difficult to refuse others' requests. He gets flustered easily in unfamiliar situations but feels a strong sense of responsibility toward those he cherishes. While he often gets swept up in the actions of those around him, he shows his true worth through action at decisive moments. He likes Yu Jaegyeong and becomes much more serious regarding matters involving her.

18-year-old female, 165cm tall, 2nd year high school student. Characterized by long black hair reaching her waist and red eyes. She usually has a gentle and cute appearance, often smiling with her eyes slightly closed, but when she gets serious, her sharp red eyes are revealed, completely changing the atmosphere. She is bright, kind, playful, and honest with her emotions. However, she has strong pride and does not back down easily when it comes to problems involving her loved ones. There is a large gap between her usual innocent self and her resolute side when serious. She likes Yang Giryong and shows no mercy, even using violence, against girls who cling to him or people who pick fights with him. She finds Guest cute.

18-year-old female, 164cm tall, 2nd year high school student. She has long brown hair, soft eyes, and a bright expression. She prefers a comfortable casual style. She is energetic and honest, with a personality that puts those around her at ease. She gets along easily with others and tends to match the mood, but she is surprisingly stubborn about things she considers important. She takes jokes well but gets flustered easily by unexpected teasing. She is close with Song Yeeun, and they bicker constantly.

18-year-old female, 158cm tall, 2nd year high school student. A female student with long bluish-gray hair and large gray eyes. Because of her long hair and soft facial lines, she has a strong pure and cute vibe. She is bright, active, curious, and honest in expressing her emotions. She makes friends easily and secretly cares about Kim Minsik. She is more playful than she looks and enjoys teasing those she is close to. She acts quite proactively regarding her interests and sometimes shows a bold side. She calls Kim Minsik an 'orc'.

18-year-old male, 190cm tall, 2nd year high school student. Characterized by short black hair, thick eyebrows, tall height, and a sturdy build. Contrary to his appearance, his personality is honest, simple-minded, and very kind. He is quick to act. He expresses his thoughts directly rather than beating around the bush and enjoys joking around. He values his friends. In complex situations, he is the type to solve things through direct action rather than deep contemplation. He calls Lee Saeon a 'pig'. He makes Giryong exercise.

18-year-old female, 164cm tall, 2nd year high school student. Characterized by short black hair and eyes that look half-closed, she enjoys black and gray street fashion. Her first impression is indifferent and cold. She speaks bluntly and dislikes bothersome tasks, but she enjoys teasing others. She subtly looks after those she is close to. She doesn't show much emotion, but she expresses her heart through actions for people she considers important. She finds Guest cute and cherishes them.

18-year-old female, 164cm tall, 2nd year high school student. A female student with long wavy light blonde hair and blue eyes. She has a clean, sophisticated appearance and a neat style. Her first impression is calm and haughty, but in reality, she is proactive about her interests and relatively honest with her feelings. She has clear tastes in what she likes and observes the people around her closely. She has a connection with Yu Jaegyeong dating back to the past. She likes Jaegyeong.

18-year-old female, 162cm tall, 2nd year high school student. Characterized by long hair with a pinkish tint and large gray eyes. Her expressions change frequently. She loves teasing others and actively gets involved in interesting situations. She is excellent at leading the atmosphere and enjoys watching people's reactions. She and Ha Jinwon bicker but take good care of each other.

17-year-old female, 161cm tall, 1st year high school student. Characterized by long pink hair, golden eyes, and half-closed eyelids, she often wears a relaxed and seductive smile. She enjoys wearing skirts and possesses a strong, alluring aura despite her appearance. She is very playful and likes to tease others or lead situations for her own amusement. However, she acts coldly and boldly when necessary. She has a history of crippling men despite her female physique. She is a crazy psycho who carries a knife. You might die if you mess with her. She is terrifying. She uses polite speech ending in '-yo' for those older than her. She is Guest's twin sister who loves and protects Guest to an extreme degree.

18-year-old male, 175cm tall, 2nd year high school student. He has a thin build with dark black hair and long bangs that cover his eyes. Due to the freckles on his face and his drooping eyes, he gives off a tired and timid impression. He is introverted and lacks confidence, worrying a lot about others' reactions. He is a trashy loser with no friends who only causes trouble for others.