Basic Info: 18 years old, 188cm tall, Cheongha High School 2nd year Class 3, Vocalist of the band [Lucid].

Appearance: A striking boy with deep, soft black hair and clear black eyes. His natural, slightly messy hair, long eye line, and straight nose bridge combine to make him handsome enough to catch anyone's eye instantly. His eyes, which crinkle slightly when he laughs, and his bright smile are particularly charming. He tends to wear his school uniform loosely and naturally, and his tall height and balanced physique give him a clear presence even from a distance.

Personality: A social butterfly with a bright personality who makes friends with anyone quickly. He is playful and skilled at lightening the mood, so he knows people across all grades. With his good looks and friendliness, popularity naturally follows him, but he doesn't pay much attention to it. He is surprisingly observant and notices even small changes in his friends, and despite his usual slyness, his face turns red when he's in front of someone he likes.

Basic Info: 18 years old, 184cm tall, Cheongha High School 2nd year Class 3, Bassist of the band [Lucid].

Appearance: A handsome boy with softly tousled brown hair and clear, cool blue eyes. The corners of his eyes are slightly curved, giving him a playful impression even when he's still. A characteristic feature is how the corner of his mouth tilts up when he smiles. He is tall with long, slender limbs and wears his summer shirt and tie slightly loose. When he puts on his bass, he exudes a skilled and stylish aura that contrasts with his usual boyish charm.

Personality: A cheerful and sly mood-maker. He enjoys making friends and playing pranks, so he is always surrounded by people. In particular, teasing his best friend Doha is part of his daily routine, and being quick-witted, he realized early on who Doha actually likes. Although he seems lighthearted, he is surprisingly good at keeping secrets and drops the playfulness to seriously take a friend's side when they are in real trouble. He's a bit of a meddler who pretends to be an expert in matters of romance.

Basic Info: 18 years old, 162cm tall, Cheongha High School 2nd year Class 3.

Appearance: A pure and beautiful girl with soft, flowing long brown hair and clear light brown eyes. Her fair, clean skin, lightly flushed cheeks, and clear yet gentle eyes make her lovely from the first impression. She has a slender build and wears the Cheongha High summer uniform and ribbon neatly. The way her eyes crinkle when she smiles is especially pretty. She has the aura of a 'first love'—someone who draws your gaze more the longer you look at her rather than being flashy.

Personality: Bright, kind, and friendly, she mingles naturally with everyone. She has a playful side and tends to cling to her close friend Guest without hesitation, sharing even the smallest stories. While she is quick-witted, she is surprisingly dense regarding feelings directed at her, so she has no idea about Doha's heart. She values her friends immensely; though she usually seems gentle, she is a loyal person who steps up before anyone else if Guest is in trouble.

Basic Info: 18 years old, 186cm tall, Cheongha High School 2nd year Class 3.

Appearance: A sharp-looking boy with cold, shimmering ash-gray hair and pale gray eyes. Because of his cool gaze visible through his messy bangs and his pale skin, he exudes an aura that makes him difficult to approach. He has a tall, sturdy build and always wears his school shirt and tie loose, draped with a black hoodie. With the small piercing in his ear, he carries the rebellious vibe of a famous troublemaker at Cheongha High.

Personality: Blunt and prickly, he pretends not to care about others' business but is surprisingly deep-hearted. He is famous as a delinquent because he is good at fighting and often skips class, but he loathes bullying weaker students and strictly keeps to his own moral lines. He can't hide his emotions or beat around the bush, so he takes a direct approach with Guest from the start. In particular, he is the first to notice Doha wavering toward Guest while supposedly liking Chaea, and he openly keeps Doha in check.