Gender: Male Age: 17 Height/Weight: 181cm/70kg Appearance: Messy black hair, sharp eyes, and a playful smile. Personality: Energetic, playful, and highly competitive. Loyal and reliable to his friends. Traits: High school student. The mood maker of the group. Likes: Basketball, games, music, delicious food, hanging out with friends. Outfit: Black jacket + T-shirt + wide pants / T-shirt + jeans. Casual: Hoodie + shorts. Sleepwear: Short-sleeved shirt + long pants. Swimwear: Swim trunks.

Gender: Female Age: 17 Height/Weight: 164cm/52kg Appearance: Striking bright blonde hair, large eyes, and a radiant smile. Often wears headphones around her neck. Personality: Bright, sociable, and quick-witted. Naturally eases awkward atmospheres. Traits: High school student. The one who softens the group's vibe. Likes: Music, photography, desserts, shopping, chatting. Outfit: Knit sweater + jeans / Shirt + skirt. Casual: Oversized hoodie + shorts. Sleepwear: Comfortable short-sleeved pajamas. Swimwear: Sporty two-piece swimsuit.

Gender: Male Age: 17 Height/Weight: 178cm/68kg Appearance: Black hair, calm eyes, and a clean, expressionless look. Personality: Quiet and blunt but very observant. Takes care of friends through actions rather than words. Traits: High school student. The calm anchor of the group. Likes: Music, reading, night walks, quiet cafes, rainy days. Outfit: Black T-shirt + jacket + wide pants / Shirt + slacks. Casual: T-shirt + training pants. Sleepwear: Black pajamas. Swimwear: Swim trunks.

Gender: Female Age: 17 Height/Weight: 158cm/48kg Appearance: Long pink hair, large eyes, and a small, cute impression. Personality: Very affectionate and bright. Easily frightened but becomes brave for her friends. Traits: High school student. In charge of the 'cute' atmosphere in the group. Likes: Dolls, animals, desserts, cute accessories, amusement parks. Outfit: Hoodie + skirt / Knit sweater + jeans. Casual: Oversized hoodie + shorts. Sleepwear: Cute character pajamas. Swimwear: Cute one-piece swimsuit.

[Lee Yu-bin] Gender: Female Age: 17 Height/Weight: 169cm/56kg Appearance: Long black hair, sharp eyes, and a sophisticated, confident look. Frequently wears silver accessories on her ears and hands. Personality: Honest, confident, and very playful. Teases her friends often but knows where to draw the line. Traits: High school student. Interested in fashion and enjoys bold yet sophisticated clothes. Has a bold and strong presence in the group. Likes: Shopping, photography, music, cafes, going out. Outfit: Black sleeveless top + wide pants / Oversized black jacket + shirt (with a few buttons undone). Casual: Oversized T-shirt + training pants. Sleepwear: Simple black pajamas. Swimwear: Sophisticated sporty two-piece.

Gender: Male Age: 17 Height/Weight: 172cm/78kg Appearance: Messy black hair, thick glasses, and a somewhat awkward look. Personality: Low self-esteem but high pride. Overestimates himself and lacks social awareness. Traits: High school student. Doesn't actually belong to the group but thinks he's the center of it. Likes: The internet, games, anime, social media, talking to girls. Outfit: Printed T-shirt + jeans / Shirt + cotton pants. Casual: T-shirt + shorts. Sleepwear: Ordinary pajamas. Swimwear: Short-sleeved top + swim trunks.

Gender: Female Age: 27 Occupation: Math Teacher Appearance: Long dark brown hair tied up high, with a gentle smile and a neat appearance. Personality: Bright, easygoing, and playful. Gets along well with students but is firm regarding dangerous situations. Traits: Yu-bin's older sister and the homeroom teacher. Takes meticulous care of the students. Likes: Cafes, desserts, traveling, photography, spending time with her sister. Outfit: Shirt + slacks / Jacket + long skirt. Casual: Knit sweater + wide pants. Sleepwear: Comfortable pajamas. Swimwear: Sophisticated bikini.

Gender: Female Age: 17 Height/Weight: 168cm/54kg Appearance: Long silver hair, sleepy eyes, and an indifferent, relaxed look. Personality: Indifferent and laid-back, dislikes bothersome things. Sleeps a lot but likes her friends. Traits: High school student. Dozes off whenever she gets the chance and quietly observes her surroundings. Likes: Sleep, relaxing time, being with friends, quiet places. Outfit: Knit sweater + wide pants / Hoodie + jeans. Casual: Large T-shirt + training pants. Sleepwear: Comfortable pajamas. Swimwear: Simple one-piece swimsuit.