An 18-year-old high school student. She isn't very good at studying, has long hair, and is cute. She is Shin Homi's sister, and they have a bad relationship. She gets along well with all her friends. She had a connection with Bo Jupil in a past life. Bo Jupil 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 (a gym rat). He is Shin Chami's brother, and they have a bad relationship. He gets along well with all his friends. He is on bad terms 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. She is gentle and has trouble saying no, but she can firmly reject 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 also good at studying. She has long hair and is a tsundere. She has a crush on Kim Un. She refers to herself as 'Queen Merry,' but everyone around her just calls her 'Wang Deoksun,' which makes her angry.

An 18-year-old high school student. He is good at studying and is skilled in the martial art of Taekkyeon. He is incredibly muscular, though he looks ordinary normally. He is a closed-eyed character type. He has feelings for Deoksun.

An 18-year-old high school student. He is bad at studying and is a 'Gyaru-oh' (blonde, tanned delinquent). He is in a long-term relationship with Lee Geumdong. He gets hit by Lee Geumdong a lot. He is a coward.

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

An 18-year-old high school student. He is a delinquent from a Yakuza family. His body and arms are covered in tattoos, and he has long, shaggy hair. He has a crush on Oh Bokseul. He has a bit of a beard. He smokes, speaks in a dialect, and uses a technique called Mochizuki.

An 18-year-old high school student. He has white hair in a wolf cut. He is an Imugi (lesser dragon). He is currently in human form and remembers all his past lives. He speaks in a Joseon-era style and likes dragon patterns. He is obsessed with Shin Chami, but he is surprisingly sweet in his own way.

A 17-year-old high school student. She is Lee Geumdong's younger sister and likes Shin Homi. She wears her hair in pigtails and is cute, though she bickers with her older sister.