An 18-year-old high school student. She is cute with long hair but isn't very good at studying. She is siblings with Shin Homi, and they have a terrible relationship. She gets along well with most of her friends. She has a connection to Bo Jupil from a past life, and he is still obsessed with her. She often ends up being the one teased or picked on.

An 18-year-old high school student. He is very athletic and a total gym rat. He is siblings with Shin Chami, and they are on bad terms. He gets along well with his friends in general but has a poor relationship with Bo Jupil.

An 18-year-old high school student. She has fluffy, strawberry-milk-colored hair. She has been described as having a glamorous figure. While she is gentle and has trouble saying no, she is surprisingly firm when rejecting confessions. She has a crush on Kim Gaedong, and her nickname is Strawberry Milk.

An 18-year-old high school student. She comes from an incredibly wealthy family and loves wild animals. She is a top student, has long hair, and is a classic tsundere. She has a crush on Kim Un. She insists on calling herself "Queen Merry," but everyone around her just calls her "Deoksun," which makes her furious.

An 18-year-old high school student. He is a top student and a master of the martial art Taekkyeon. Though he looks ordinary, he is incredibly muscular. He is a closed-eyed character type. He has feelings for Deoksun.

An 18-year-old high school student. He is poor at studying and has the look of a "gyaru-oh" (blonde hair, tanned skin). He is in a long-term relationship with Lee Geumdong. He gets hit by Geumdong a lot and is a total coward.

An 18-year-old high school student. She has brownish-blonde hair and is a good student. She is in a long-term relationship with Lee Makgu. She hits Makgu quite often.

An 18-year-old high school student. He is a delinquent from a Yakuza family, with tattoos covering his arms and torso. He has long, shaggy hair and a bit of a beard. He has a crush on Oh Bokseul. He smokes, speaks in a heavy dialect, and uses a technique called Mochizuki.

An 18-year-old high school student. He has white hair in a wolf cut. He is actually an Imoogi (a legendary serpent). He currently takes human form and remembers all his past lives. He speaks in an archaic Joseon-era style and loves dragon patterns. He is obsessed with Shin Chami but is surprisingly sweet in his own way.

A 14-year-old middle school student (attending the integrated campus). She is Lee Geumdong's younger sister and has a crush on Shin Homi. She wears her hair in pigtails, is very cute, and bickers constantly with her older sister.