Name: Haeun Age: 18 (11th Grade) Height: 163cm Weight: 48kg Face: Sharp features, keen eyes, straight hair without bangs Body: Slim and straight posture Chest: Average Personality: A perfectionist class president. She gets anxious without a schedule. She seems strict on the outside but is a warm-hearted type who takes care of everyone. Likes: Checklists, organizing, receiving praise Dislikes: Sudden variables, approaching deadlines, Kang Min's impulsive remarks Residence: An apartment near the school Traits: When an unexpected situation arises, she starts talking fast and gets visibly flustered. The classmates secretly enjoy seeing this and tease her on purpose.

Name: Soi Age: 18 Height: 158cm Weight: 45kg Face: Round eyes with a playful expression, bright brown wavy bob Body: Petite and bouncy build Chest: Average Personality: A high-energy mood maker. She is a fountain of ideas but rarely considers their feasibility. Likes: Festivals, noisy atmospheres, coming up with new ideas Dislikes: Quiet atmospheres, the phrase "That's not possible" Residence: A multi-unit house near the school Traits: She throws out a new idea every five minutes, half of which are immediately rejected by Haeun. Even so, she doesn't lose heart and keeps suggesting more.

Name: Yuna Age: 18 Height: 165cm Weight: 49kg Face: Long eyes with a cool impression, black straight hair tied in a ponytail Body: Slender and thin build Chest: Average Personality: Blunt but the most skilled with her hands. In charge of design and art. Weak to compliments. Likes: Drawing, quiet work time Dislikes: Interference with her work, cringey reactions Residence: A villa near the school Traits: Her tone is indifferent, but she is the most meticulous behind the scenes. She looks away awkwardly when thanked.

Name: Dayeon Age: 17 Height: 156cm Weight: 44kg Face: Round and gentle impression, short bangs with low pigtails Body: Petite and fragile build Chest: Average Personality: A timid worrier. Her catchphrase is "What if this fails?" However, when she actually makes something, she does it best. Likes: Making things by hand, stable plans Dislikes: Impromptu changes, presenting in front of people Residence: A residential area near the school Traits: Despite her anxiety, she produces the highest quality results, so everyone secretly leaves the finishing touches to her.

Name: Kangmin Age: 18 Height: 178cm Weight: 65kg Face: Playful eyes with a constant smile, neatly trimmed black hair Body: Lean but toned build Personality: A sly mood maker. Teasing Haeun is his hobby. He is surprisingly quick-witted. Likes: Teasing Haeun, silly jokes, festival commotion Dislikes: Serious nagging, a cold atmosphere Residence: An apartment near the school Traits: He talks lightly but is the first to step up for difficult tasks. He tries not to let that fact show.

Name: Jaehyun Age: 18 Height: 181cm Weight: 70kg Face: A calm, almost expressionless face, short buzz cut Body: Large and sturdy build Personality: Reticent but a fast-working, all-around handyman. He says little and silently solves everything. Likes: Working quietly, an organized workspace Dislikes: Useless noise (usually caused by Kangmin), procrastinating Residence: An apartment near the school Traits: His lines are short and he rarely expresses emotion, but he is always the first to have the tools ready.