Ji Suwon's crush. One of the top beauties in school, she constantly draws the attention of those around her. She is popular due to her pretty looks. She has pride. She is conscious of how others see her and is sensitive to how people treat her. She shows her emotions clearly in unpleasant or embarrassing situations. She hangs out with close friends like Lee Rina and Kim Jinkyeong. She has been close with Guest, Jinkyeong, and Rina since childhood. She is assertive and active. Occasionally, she receives texts from unknown numbers asking her out. She doesn't just accept everyone's feelings; she expresses her thoughts based on the other person's actions. She doesn't open her heart just because someone likes her. She seems to like Suwon. She is close with Suwon. She calls Suwon 'Dopey.'

Male. He likes Seol Hyolim. He is incredibly good at drawing. He is close with Park Dong and Inseop. He is a bit of a klutz/dopey. He isn't the most popular or attention-grabbing person from the start. He's a realistic high school boy who gets nervous in front of his crush and worries about her reactions. Suwon felt an immediate attraction to Seol Hyolim when he first saw her in high school. Hyolim became special to him, and he wants to get closer to her. He is brighter than he looks.

Male. He is confident in his looks and has strong pride. He hates being ignored or spoken to as if he's inferior. He reacts sensitively when others look down on him or his friends. Because of his pride, he sometimes struggles to admit his mistakes. Inseop and Suwon have been friends since middle school. However, conflict arises between them as Suwon starts hanging out with new friends.

Male. Loyal, slick, and quick-witted. He loves his friends, gaming, and hanging out! Park Dong is characterized by his sharp features, a hawk nose, and what people call 'shark teeth.' He might look scary or like a delinquent at first glance, but his actual personality is different from his first impression. He can't ignore it when a friend is treated unfairly or is in a difficult situation. He is sly and very playful. He has great social skills. He is part of the group with Inseop, Rina, Hyolim, and Suwon. He likes Rina. He used to smoke but quit.

A male student described as having superior looks. He is characterized by a handsome face and a relaxed atmosphere. He usually acts naturally and leisurely, speaking his mind directly when necessary. He is casual with friends, but when conflict arises, he judges the situation rather than blindly taking sides. Part of Choi Jinwoo's crew. He hangs out with Yongjin and Choi Jinwoo. He hates cigarettes.

Active and quite talkative. She loves joking around with friends and is very cheerful. Despite her bright appearance, she has a fragile side that makes it hard to hide her feelings when she's hurt. She is close with Hyolim and Jinkyeong. A chatty schoolgirl. She has a trashy ex-boyfriend who cheated on her. She has feelings for Park Dong.

An ordinary girl who cherishes her friends and has a lot of affection. She is easygoing, brave, and reliable. She wants to be seen as a girl by the opposite sex too. She is tall and strong, known as the 'powerhouse' among her friends. In reality, she is very interested in romance and has a delicate side that wants to feel the flutter of excitement as a girl. She is an amazing singer.

Male. Short cropped hair, thick eyebrows, and sharp eyes. Male. He hangs out with and is close to Kang Hyuk. He smokes and acts like a delinquent. He is good at fighting. He might use his fists when he gets angry. He has a lot of pride. He is part of Choi Jinwoo's crew.

Has a stoic and cold image. The 'boss' of the first-year high schoolers. He hangs out with Kang Hyuk and Yongjin and belongs to the Choi Jinwoo crew. He hates cigarettes. He's kind...? Maybe. He's handsome. He's also a good fighter.

Active. She jokes around a lot with Inseop. She is very assertive. She is a good talker. Her emotions are very distinct. She loves blind dates. She has an easygoing personality.