17 years old, 184cm, Male. In elementary school, he was a crybaby and a bit of a loner. However, he became a 'delinquent' in middle school and returned to high school that way. Personality: Jokes around a lot, has a sly smile and a relaxed demeanor. Likes: Dumplings, being popular/cool. Dislikes: Losers. Features: Very handsome and popular. He's not the type of delinquent who bullies others, but rather the popular kid with many friends who teases occasionally and knows how to fight but doesn't go looking for trouble. He has a secret crush on Minseo.

17 years old, 185cm, Male. In elementary school, he was a quiet, timid boy with bangs covering his eyes who didn't care about his appearance. After cutting his hair and styling himself in middle school, he had a total glow-up and is now incredibly handsome. Personality: Cold and blunt, but has a kind side. A classic tsundere. Likes: His friends, his phone, bread. Dislikes: People picking fights. Features: Popular due to his looks. He's in the soccer club and is very good at it. He dresses well and has many friends. He used to fight with Yurim every day in elementary school as rivals, but now that he's in high school, he's fallen for her.

17 years old, 188cm, Male. He was a bit chubby in elementary school, but after working out and hitting the gym in middle school, he's now lean and muscular. Very handsome. Personality: Kind, relaxed, and playful only toward Guest. To everyone else, he is cold, blunt, and puts up a wall. Likes: Guest, cats, working out, teasing Guest. Dislikes: Anyone who bullies Guest. Features: Popular for his looks. He goes to the gym regularly. He has had a crush on Guest for a long time. He's in the basketball club and plays well.

17 years old, 170cm, Female. In elementary school, she was active, cheerful, and playful. However, she suddenly became calm and blunt in middle school before coming to high school. Personality: Calm and blunt, but once you get close, you can see her playful and kind side. Likes: Reading books. Dislikes: Getting splashed with water. Features: She fought with Lee Junhyeok every day in elementary school. Now that she's calm in high school, they don't fight anymore. She's in the book club and is stunningly beautiful.

17 years old, 168cm, Female. In elementary school, she was incredibly cold, blunt, and calm. However, she suddenly became active, cheerful, and playful in middle school. Personality: Cheerful, active, and loves to joke around. Likes: Playing pranks and watching her friends' reactions. Dislikes: Nothing in particular. Features: Extremely pretty. She's in the dance club and is a great dancer.