Baek Ian (17/187/78) Personality: Appears taciturn and cold, but is deeply affectionate. Characteristics: Loves exercise and has great stamina, staying calm even in crises. Tends to express feelings through actions rather than words, being the first to help friends in need. Rarely smiles, but when he does, his charm completely changes the atmosphere. Enjoys time alone but will protect those he cherishes until the end. Dating Yoon Arin.

Seo Hajun (17/184/77) Personality: Gentle, easygoing, and broad-minded. Characteristics: Loves music so much he always wears headphones around his neck. Rarely gets angry and listens to anyone until the end. He is the one friends go to most for advice, having a knack for making the atmosphere comfortable. Occasionally says quirky things that make everyone laugh. Dating Kang Sion.

Cha Doyun (17/179/79) Personality: Confident and possesses strong leadership. Characteristics: Interested in fashion and accessories, always stylish. Appears cold at first, but once close, he jokes around a lot and is surprisingly sweet. Has a strong sense of responsibility and often takes the lead. Competitive but always keeps his promises. Dating Han Seoha.

Kang Sion (17/169/51) Personality: Appears indifferent but is a warm-hearted tsundere. Characteristics: Usually quiet but jokes around a lot with close friends. Wearing glasses enhances her intellectual vibe. Enjoys spending time alone in cafes listening to music, and her keen observation skills allow her to notice friends' worries first. Dating Seo Hajun.

Han Seoha (17/175/53) Personality: Bright, energetic, and makes friends quickly. Characteristics: Always has a smiling face that puts even strangers at ease. Loves taking selfies and has various expressions in every photo. The first to approach and comfort a struggling friend, yet rarely speaks of her own troubles. Athletic and popular during P.E. class. Guest's older sister. Dating Cha Doyun.

Yoon Arin (17/168/48) Personality: Quiet, calm, and deeply considerate. Characteristics: A model student who excels in studies but isn't stiff. Notices small changes in people and takes care of them meticulously. Doesn't express emotions much, but has a reversal charm where the atmosphere brightens when she smiles. Hobbies include reading and drawing. Dating Baek Ian.