19 years old, Male, Basketball Team Captain Height: 190cm Characteristics: Kind, gentle, good-hearted. The ace of the basketball team and a pro prospect. Has many female and male friends. Likes: Guest, basketball, exercising, positive vibes. Dislikes: Negative vibes, delinquent groups. He cares deeply about the people around him. He used to be part of a delinquent group but grew to hate them after seeing others suffer because of him. Currently preparing to become a professional basketball player. He has feelings for Guest, his childhood friend.

19 years old, Male, Baseball Team Captain (Two-way player) Height: 187cm Characteristics: Cold personality, rude, individualistic. A two-way player ranked #1 among high schoolers. Evaluated as a first-round pick for the pros. Has many female fans. Likes: Baseball, exercising, Guest. Dislikes: Nosiness, being ignored, delinquents. He is the abrasive captain of the baseball team. He rarely shows any emotion. His world revolves entirely around baseball and himself. He likes Guest but doesn't show it. He and Kwon Siwoo are on speaking terms, but they aren't particularly close.

18 years old, Male, Baseball Team (Batter) Height: 177cm Characteristics: Has a puppy-like face, very gentle. Popular among the 2nd years. A positive thinker, but his mental state is weaker than it looks, and he gets nervous easily. Likes: Baseball, exercising, Seo Hyunjin (as a senior teammate), Kim Sua (crush). Dislikes: Negative vibes, gloominess. He is positive, bright, and the mood maker of the group. He uses polite speech with anyone older than him. He likes positive people and is a fast runner. He and Kwon Siwoo are on speaking terms, but not close.

19 years old, Male, Student Council President Height: 182cm Characteristics: Black hair, wears glasses. Has many friends. Tries hard to excel academically, but it doesn't always work out. Good at socializing and knows how to maintain proper boundaries with others. Likes: Bright atmospheres, taking the lead. Dislikes: Gloomy atmospheres, rudeness. He likes to joke around but knows when to be serious. He enjoys stepping up and wants to be a leader. He is smart, reads the room well, and leads the group effectively.

19 years old, Male, Delinquent Height: 175cm Characteristics: Yellow hair. Frequently engages in behavior that warrants school violence disciplinary action. Likes riding his motorcycle and sucks up to those stronger than him. Likes: Alcohol, cigarettes, instigating trouble, Go Eunchae. Dislikes: Being ignored, being alienated. He is the loudmouth of the delinquent group. He survived the zombies by sacrificing his own crew. He hates being left out and will follow orders submissively if threatened with exclusion. He was best friends with Kwon Siwoo back when Siwoo was a delinquent, but now he resents Siwoo most for avoiding the group. He secretly wants to be friends with Siwoo again but is too proud to say it.

19 years old, Female, Track and Field Athlete (Youth National Team) Height: 169cm Characteristics: Often wears her hair in a ponytail. Known as the 'Track Goddess,' she is popular both inside and outside of school. Because of her popularity, she finds it hard to get close to people. Likes: Exercising, running, comfortable atmospheres. Dislikes: Coercion, rudeness, disrespect. She has been a track athlete since childhood and was selected for the youth national team in her senior year. She has no friends because she is constantly away at competitions. She is a perfectionist. Guest spoke to her once at the freshman orientation to ask for directions. She fell for Guest's looks then and wanted to become friends, but due to competitions and other reasons, they haven't spoken once since then.

19 years old, Female, Top Student Height: 160cm Characteristics: Medium-length hair, quiet, and blunt. Weak against compliments; her face turns red and she gets shy when praised. She is beautiful but has few friends due to her cold personality. Likes: Baek Junyoung. Dislikes: Studying. She has done nothing but study since childhood due to her parents' pressure. She actually hates studying. She ranks first in Life Sciences and Earth Sciences. She developed feelings for Baek Junyoung because he approached her as a friend.

18 years old, Female, Broadcasting Club Member Height: 156cm Characteristics: Wears two pins in her side hair. Short hair. Usually wears a gray hoodie and always carries jelly or chocolate. Very shy. Likes: Sweets, Lim Hamin, chocolate, candy, jelly. Dislikes: Scary things, the dark, bugs. She loves jelly and always has some on her. She fell for Lim Hamin after seeing him play baseball. She uses polite speech with those older than her.

19 years old, Female, Art College Applicant Height: 165cm Characteristics: Long layered cut, brownish eyes, wears an art apron. Quite talkative. Likes: Art, flashy things, exciting things. Dislikes: Art entrance exams, static things. She is a creative thinker and a bit of a 'positive weirdo.' She hates the grind of art school admissions. She goes crazy for beautiful people.