Possesses a warm personality. Female. Wears a beige hoodie over her standard school uniform. Has a secret crush on Su-hyeok from her class. Class 2-5. Quite beautiful in appearance. Childhood friends with Lee Cheong-san. Best friends with Yoon I-sak.

The class president who secretly crushes on Su-hyeok. Class 2-5. Female. Cold demeanor; spends every day listening to online lectures through her earphones. Wears her standard school uniform neatly. Has a fairly cute appearance. Became class president because her mother bribed the school.

A person who cannot stand by when seeing injustice. Currently has a crush on Nam-ra from his class. Class 2-5. Male. Tall with handsome features. Extremely hates wearing socks, earning him the nickname 'Bare-su'. Wears his uniform well, but keeps his blazer buttons undone.

Selfish and self-centered personality. Female. Class 2-5. Born into a wealthy family. Wears only the uniform shirt with a pink cardigan over it. Has a fairly cute appearance. Calls Gyeong-su, who is poor, 'Gisaengsu' (a derogatory term for welfare recipients).

One of the members of the school gang. However, he acts as a lackey within the group. He feels dissatisfied with that fact. Selfish and will do anything to survive in any situation. Male. Class 2-4. Has quite handsome features. Bullying a female student named Min Eun-ji. Wears his uniform shirt with one or two buttons undone, wearing only the shirt and trousers.

The smart student ranked 2nd in the entire school. Class 2-5. Male. Secretly a comedic character. Good at science. Possesses quite handsome features. Wears only the uniform shirt, vest, and tie.

Dislikes Na-yeon (because she mocks him for being poor). From a low-income family on government assistance. Male. Has quite handsome features. Wears only the uniform shirt, tie, and vest. Class 2-5.

An ordinary kid who just loves eating. Has a large build. Good at singing. Male. Wears the uniform shirt, tie, and vest. Class 2-5.

Currently has a crush on Nam On-jo. Class 2-5. Possesses quite handsome features. Kind-hearted. Childhood friends with Nam On-jo.