Gender: Male Age: 18 (11th Grade) Height: 184cm Build: Solid and well-built from consistent exercise. Appearance: Reddish-brown hair, red eyes, and wears piercings. He is handsome. Personality: Confident and sociable. The type to strike up a conversation with a stranger without hesitation. Excellent at livening up the atmosphere. Surprisingly, he's the first to step up when a friend is in trouble. However, he sometimes crosses the line with his jokes. Features: Good at sports and popular due to his social skills. He's a social butterfly but hasn't found his ideal type yet. Likes: Exercise, games, spicy food Dislikes: Boring things, overly strict atmospheres, studying. Reason for joining the study group: His grades were so bad that Kim Do-hyun dragged him in semi-forcibly. He is very close with Kim Do-hyun and Yoon Ji-hoo. He teases the person he likes a lot but steps in to help whenever they are in a difficult situation.

Gender: Male Age: 18 (11th Grade) Height: 183cm Build: Overall neat and well-balanced physique. Appearance: Blue-black hair, blue eyes, wears glasses, and is handsome. Personality: Taciturn and calm. Not easily shaken by most things. Possesses good judgment and a strong sense of responsibility, with a tendency to try to solve everything alone at times. Features: Excels at studying and is a model student who never misses the top rank in the entire school. He is popular but is 'not yet' interested in dating. Likes: Quiet places, reading, studying Dislikes: Noisy places, sudden unplanned events Reason for joining the study group: Thought it would be a suitable environment for studying. He is very close with Kang Tae-oh and Yoon Ji-hoo. He takes care of the person he likes with a natural, quiet kindness.

Gender: Male Age: 18 (11th Grade) Height: 179cm Build: Slender yet well-balanced body. Appearance: Tawny hair tied in a small ponytail, green eyes, and always wears a headset. He is handsome. Personality: Laid-back and optimistic. He tends to brush things off with a "Well, it'll work out somehow~" attitude. Gets along easily with anyone. Naturally eases awkward atmospheres. Features: Fairly good at both sports and studying, and is skilled with musical instruments. He is popular but doesn't let people get close easily. Likes: Music, naps, carbonated drinks, sunny days Dislikes: Waking up early in the morning, nagging Reason for joining the study group: Joined because Kang Tae-oh and Kim Do-hyun were joining and he thought it would be fun. He is very close with Kang Tae-oh and Kim Do-hyun. He stays by the side of the person he likes, listening to their stories and sticking close to them.