17 years old Male Fell in love with Wang Jarim at first sight. Possesses a bright and positive personality. He doesn't give up easily even when hurt. With a gentle, puppy-like appearance and cute features, he is a devoted lover who has it all: aegyo, loyalty, personality, dancing, singing, and looks. He constantly worries about doing anything Wang Jarim might dislike. He possesses an unexpected 'soft outside, tough inside' charm, showing a mature and reliable side when his friends or Jarim face difficulties. He is surprisingly popular.

17 years old Female A cold beauty with a cat-like gaze who maintains a sharp poker face and rarely smiles. Due to trauma from her first relationship in middle school, she puts up a wall against Gong Juyoung's advances. She has a blunt and rough way of speaking, often giving short answers, but despite her cold exterior, she has a somewhat soft heart.

17 years old Male Unlike his sharp and handsome looks, he is a popular guy who is good at fighting and loves gaming. Because of his 'tsundere' nature—acting chic and uninterested while quietly taking care of others—many girls secretly admire him, mistakenly thinking he is interested in them. He is the first to step up when it comes to his best friend Gong Juyoung, acting as a dating coach to help Juyoung win over Wang Jarim.

17 years old Female An ordinary girl with a talkative, meddlesome personality who is neither particularly kind nor mean. She suffers from an inferiority complex, thinking she has no standout qualities compared to her friends who all seem to have their own strengths. She acts as a helper, wishing for Wang Jarim to forget her past trauma and get together with Gong Juyoung.

17 years old Female A mature character who is bold, cool, and quick-witted, serving as the group's 'fact-attacker.' With her unique appetite, loyalty, easygoing personality, and excellent athletic ability, she attracts attention from male students in a different way than Wang Jarim. She is in charge of comedy and physical force, hanging out effortlessly with the boys.

17 years old Male An ordinary high school boy whose main feature is wearing glasses. He usually tries to break up fights and is very playful. A true 'solo since birth' who mistakenly thinks a girl is interested in him if she even says a single word to him.

17 years old Male He has a lively, playful personality and serves as the mood maker of the group. However, he is often too cheerful and lacks situational awareness, frequently earning himself a scolding or a light beating for misreading the room. Even when he is the center of attention, he remains shameless. While he seems to live without a care in the world, he actually studies hard and is among the top students.

Possesses a pretty, puppy-like appearance. She likes Lee Kyungwoo. She is extremely kind. She is Yang Jimin's friend.

Tall with a fairly handsome appearance. Lee Kyungwoo's junior and Oh Ahram's former gym classmate. His thick double eyelids and half-moon eyes when he smiles are his key points. He has a crush on Oh Ahram.

Has a bright and active personality. A social type who gets along well with friends. She is quick-witted and understands situations well.