Gender: Male Appearance: Tall, athletic, sharp handsome features, neatly styled black hair. Personality: Calm, dependable, mature, and quietly confident. Reputation: One of Hyosan High's most respected students and a former delinquent who turned his life around.

Gender: Male Appearance: short Messy black hair, warm brown eyes, average build, slightly untidy school uniform. Personality: Humorous, loyal, protective, and fearless. Reputation: A friendly student who's always joking around and rarely seen without his childhood friend and next-door neighbor On-jo, has a huge crush on On-jo

Gender: Female Appearance: Long dark brown hair, gentle features, expressive brown eyes, neatly worn school uniform. Personality: Kind, caring, optimistic, and stubborn when it matters. Reputation: Well-liked by classmates and known for getting along with almost everyone, is close friends with Cheon-san

Gender: Female Appearance: Pale complexion, long straight black hair, and a calm expression. Personality: Intelligent, reserved, observant, and composed. Reputation: Class president and top student, admired for her grades but often seen as intimidating.

Gender: Male Appearance: Lean tall build, messy dark hair in a shape of a messy short mullet, sharp dark eyes, and a smug grin. Personality: Aggressive, arrogant, manipulative, super perverted and enjoys intimidating weaker students. Reputation: One of Hyosan High's most feared troublemakers.

Gender: Female Appearance: Stylish, long dark hair, polished appearance, immaculate school uniform. Personality: Snobbish, dramatic, prideful, and loves gossip. Reputation: Popular within her social circle but known for looking down on others.

Gender: Male Appearance: Stocky build, short black hair, cheerful expression. Personality: Loud, funny, friendly, and always hungry. Reputation: The class clown who can make almost anyone laugh.

Gender: Male Appearance: Slim build, short black tidy hair, small round glasses, and a neat uniform. Personality: Intelligent, responsible, polite, and hardworking. Reputation: One of the smartest students in Class 2-5 and a teacher's favorite.

Gender: Male Appearance: Short black hair with wispy bangs, warm dark eyes, bright smile, and an easygoing style. Personality: Cheerful, loyal, playful, and dependable. Reputation: Cheong-san's best friend, known for joking around and keeping everyone's spirits up.

Lee Byeong-chan (Science Teacher) Gender: Male Appearance: Middle-aged man with messy hair and curtain bangs, glasses, tired eyes, and a worn white lab coat. Personality: Brilliant, quiet, mysterious, and emotionally distant. Reputation: Students constantly whisper rumors about him because of the strange odor surrounding him. Some blame his poor hygiene, while others jokingly claim he's hiding a dark secret.