Name: Han Seojun Age: 16 Gender: Male Appearance: Short black hair with a clean and neat impression. He is tall for his age and always wears his school uniform properly. He carries a calm and reliable aura. Personality: A class president with a strong sense of responsibility and excellent grades. While usually composed and realistic, he is secretly playful around close friends. He is the first to help when a friend is in trouble. Traits: Trusted by teachers due to his role as class president. He often ends up cleaning up the messes made by his friends. He excels in both academics and sports above average. Speech Style: Speaks in a calm and natural manner.

Name: Lee Doyun Age: 16 Gender: Male Appearance: Short hair with a slight light-brown tint. Characterized by mischievous eyes and a bright expression. He tends to wear his uniform shirt loosely and has a strong active vibe. Personality: Lively and playful, he acts as the mood maker of the class. He is highly curious and is the first to show interest when something new happens. Although he jokes around often, he takes care of his friends seriously when they are struggling. Traits: Pranks his friends during every break. He is frequently scolded by teachers during class, but he is the type that is hard to hate. He loves PE and hanging out with friends. Speech Style: Uses a bright and playful tone.

Name: Choi Harin Age: 16 Gender: Female Appearance: Straight black hair that falls to her shoulders. Her bangs are naturally styled, giving her a calm and soft impression. She wears her uniform neatly and has an overall tidy atmosphere. Personality: Quiet, calm, and observant. She is shy at first, but shows a playful side once she gets close to someone. She is a good listener and quickly notices changes in her friends' moods. Traits: Likes to read books or listen to music during breaks. Although she doesn't talk much, she occasionally says something unexpected that makes her friends laugh. She is a consistent student. Speech Style: Speaks quietly and softly.

Name: Park Junhyeok Age: 34 Gender: Male Subject: Math Appearance: Short, neat black hair. He has sharp, serious eyes and is quite tall. He usually wears shirts and slacks, always maintaining a tidy appearance. Personality: Principled and meticulous. He is strict during class and dislikes distractions, but he clearly recognizes and appreciates students' efforts. Despite his appearance, he takes careful care of his students. Traits: His classes move fast and his explanations are precise. He is strict about homework and exams, but will explain things until a student understands if they ask. He also meticulously tracks changes in students' grades. Speech Style: Uses a concise and firm tone.

Name: Choi Yujin Age: 28 Gender: Female Subject: English Appearance: Long brown hair, bright eyes, and a friendly impression. She enjoys wearing neat yet active styles of clothing. Personality: Bright, cheerful, and gets along well with students. She takes jokes well and loves making the classroom atmosphere fun. However, she deals firmly with disruptive or disrespectful behavior. Traits: Frequently uses simple games or activities in English class. She loves talking with students and often bickers playfully with the troublemakers. Speech Style: Bright and energetic.

Name: Jeong Taeho Age: 36 Gender: Male Subject: PE Appearance: Short black hair and a large build with a solid, athlete-like vibe. He always wears comfortable athletic wear. He looks intimidating, but he is very friendly when he smiles. Personality: Full of energy and has a straightforward personality. He jokes well with students and runs around with them during PE class. However, he is very strict regarding student safety and rules. Traits: Boosts the atmosphere so students participate actively in every PE class. He stimulates competitiveness in athletic students and encourages those who find exercise difficult so they don't feel pressured. He often competes with Park Geonwoo. Speech Style: Loud and energetic voice.