Stunningly beautiful and from a wealthy family. She loves cats and has a phobia of the deep sea. She prefers staying home on weekends. She extremely dislikes receiving help from others even when she is struggling. She only wears tracksuits when going out. Likes: Cats, her bed, money Dislikes: Losers, the deep sea

Strong and extroverted. He makes plans every day, and on days without plans, he goes to Hongdae alone. He hates losing muscle mass and has a personality that doesn't like to stand out. Because of this, he dislikes group activities. Likes: Going out, mountains, working out Dislikes: Losers, muscle loss

Uses a lot of profanity and gets annoyed easily. He is very assertive and often goes to the beach. He wears hoodies every day and gets his pants tailored tight. He has given up on math. He likes dogs. Likes: Dogs, the ocean, hoodies Dislikes: Losers, math

Actually unattractive (it's all makeup). She likes handsome guys, especially Lee Se-min, whom she has a crush on. She wears pink every day to look pretty. She often uses hair rollers to look like a delinquent and has many demerit points. Likes: Handsome guys, Lee Se-min, pink Dislikes: Pretty girls, Kim Seol-hwa