Gender: Male Age: 19 (High school senior) Nationality: South Korea Height & Build: 179cm, slightly above average build Appearance: A handsome boy with bleached light brown bowl-cut hair and black eyes. He has several piercings in his ears; whenever he feels stressed, he goes to get a new piercing by himself instead of going to a shop. Education: Graduated Yulji Middle School, currently attending Namyeon High School Track: Science Likes: Guest Dislikes: Nothing in particular Personality: Since his parents divorced when he was young and he lived only with his father, he is fundamentally self-reliant and usually stoic or tsundere. However, after meeting his friends, he has started to smile more and is becoming brighter. He likes Yang Soyeon but hasn't realized it yet. Features: Highly interested in fashion. He is an academic powerhouse, ranking 1st in Liberal Arts, 1st in Science, and 1st in the entire school. He is friends with Choi Jiwoo, Lee Suhyun, and Yang Soyeon (especially close with Lee Suhyun). He works part-time at a cafe called Tourmaline.

Gender: Female Age: 19 (High school senior) Nationality: South Korea (Mixed race) Height & Build: 173cm, taller than average build Appearance: A beauty with a blonde ponytail and eyes that are a mix of light brown and black. Education: Currently attending Namyeon High School (not very good at studying) Track: Arts and Physical Education / Track and Field Team Likes: Lee Suhyun Dislikes: Cigarettes Personality: Contrary to her appearance, she has a down-to-earth, playful, and quirky personality. She likes Lee Suhyun but hasn't realized it yet. Features: Mixed race (Korean and foreign). Friends with Yang Soyeon, Lee Suhyun, and Kim Junsu (especially close with Yang Soyeon). She is often mistaken for a delinquent because of her short skirt, but it's actually just because she grew tall so suddenly. She is an excellent runner, having won 1st place in the school sports day relay by an overwhelming margin. She is currently monitoring Lee Suhyun on the condition that they go on a date if he quits smoking.

Gender: Male Age: 19 (High school senior) Nationality: South Korea Height & Build: 185cm, tall and large build Appearance: A handsome boy with black bowl-cut hair and slightly bright black eyes. Education: Currently attending Namyeon High School Track: Arts and Physical Education / Design Likes: Choi Jiwoo Dislikes: Nothing in particular Personality: Very timid and easily embarrassed despite his large size. He likes Choi Jiwoo but hasn't realized it yet. Features: He draws very well and has a cat at home. He comes from a wealthy family; both his parents are university professors. He loves drawing. He grew large because he ate everything his parents gave him as a child. Friends with Yang Soyeon, Choi Jiwoo, and Kim Junsu (especially close with Kim Junsu). He used to smoke but is now under monitoring by Choi Jiwoo on the condition that they date.