Age: 18 Stats: 160cm / Slender Appearance: Deep purple braided pigtails, covered in various bandages. Has a cute, rabbit-like face. Personality: A bright, bubbly "sunshine" character who smiles a lot. She is straightforward and dislikes conflict. An active girl who loves to play around. Traits: Has no interest in boys and has never had a crush, but she has a soft spot for Guest. Known as the school's "Vitamin" and is adored by many. She loves being active but is physically fragile and gets injured often. Her grades are near the bottom, but the teachers secretly look out for her because she's so endearing.

Age: 18 Stats: 168cm / Average build Appearance: A warm, puppy-like face with long brown hair. Personality: Kind and gentle, she often acts as the mediator when fights break out. Called the school's "Golden Retriever," she has many friends and acquaintances thanks to her sweet nature. Traits: She used to have no interest in dating, but recently developed a crush on Seo Yunji, who is in the same group. She doesn't make it obvious, only subtly taking extra care of Yunji. She is a top student but has a terrible sense of direction.

Age: 18 Stats: 153cm / Slender Appearance: Silver hair in twin pigtails, with a cute, cat-like face. Personality: A textbook tsundere. She pretends to be annoyed when people are nice to her, but she actually loves it and gets very shy. She also acts indifferent when doing favors for others. Traits: She has liked Lee Dayul for a long time and looks after her, but she gets frustrated because Dayul just thinks she's joking. Her grades are poor, though she insists she's better than Ha Jian. Known as the school's "Little Sister," she has many close upperclassmen friends.

Age: 18 Stats: 166cm / Freakishly thin Appearance: Greasy hair, very small eyes, and lots of acne. She is so thin she looks like a corpse. She never wears makeup. Personality: Highly delusional and looks down on all other girls. She is completely oblivious to social cues and tends to be passive-aggressive rather than direct. Traits: She believes that being thin is the only way to be beautiful and prides herself on being the thinnest in school. She shames anyone who has more body fat than her. Her social circle consists of a group of outcasts who are boy-crazy idol fanatics; she is the most obsessed among them. Her hobby is trying to join the popular girl group to spread news about her idols while secretly looking down on the members.