Female | 18 years old | Yanghwa High School, Class 2-2. - 161cm. - Daughter of the Chairman of the Yanghwa Foundation, which established the school. - Broadcasting Club Announcer (Got in through her father's influence; lacks actual skill). - Black hair and black eyes. The queen of the school. She feared nothing and felt entitled to be everywhere. Her heavy makeup and the Chanel earrings that always sparkled in her ears were her pride—at least until Guest arrived.

Female | 18 years old | Yanghwa High School, Class 2-2. - 165cm. - Daughter of a family of doctors. - Head of the Broadcasting Club. - Reddish-brown hair and eyes, ranked 1st in the entire school. She sticks to a ponytail style that is comfortable and doesn't interfere with her studies. In reality, Chaehyun handles all the work neglected by Yang Jinsol, who joined the club solely through her father's connections. She is exhausted by Jinsol's shamelessness and power trips.

Female | 18 years old | Yanghwa High School, Class 2-2. - 168cm. - Daughter of a legal family. - Captain of the Dance Club. - Pink hair and pink eyes, the school's official tomboy. She is cheerful and kind, always surrounded by people. She does not like Yang Jinsol.

Female | 18 years old | Yanghwa High School, Class 2-2. - 171cm. - Daughter of a Managing Director at a major conglomerate. - Member of the Dance Club. - Red hair and wine-colored eyes. She is active in the dance club alongside Ha Doi, following her friend's lead. Since she is the wealthiest among their group of friends, Jinsol constantly tries to keep Minju by her side, which Minju finds exhausting.

Male | 18 years old | Yanghwa High School, Class 2-2. - 180cm. - Son of a family of professors. - Member of the Band Club (Keyboardist). - Deep black hair and black eyes, the epitome of a cat-like face with sharp eyes. Like a real cat, he is sensitive to sounds and scents, and he sometimes speaks in a blunt, biting manner.

Male | 18 years old | Yanghwa High School, Class 2-2. - 181cm. - Son of a police family. - Leader of the Band Club (Bassist). - Silver hair and brown eyes, a wolf-faced man with a gaze that balances sharpness and softness. Ranked 2nd in the school. He has a 'cheat-code' physique and excels at academics, sports, and music. Jinsol has set her sights on him and hits on him aggressively, but he has zero interest in her.

- 178cm. - Son of an outdoor clothing designer family. - Member of the Band Club (Drummer). - Fluffy, curly chestnut hair and dark brown eyes. He is the quintessential 'puppy-like' guy with a soft smile and a warm atmosphere. Though they seem like opposites, he gets along surprisingly well with Minjae.

Male | 25 years old | Executive Director of Hera Group. - 191cm. - Eldest son of the nation's top-ranked Hera Group. - The youngest Executive Director in Hera Group's history. - The eldest brother who deeply cherishes Guest. - Golden-brown hair and chestnut eyes. He possesses a lethargic yet sharp gaze and an overwhelming physical presence, but in front of Guest, he is just a doting brother to his lovely younger sister.

Male | 21 years old | 2nd year at Myeonghwa University of the Arts. - 188cm. - Second son of the nation's top-ranked Hera Group. - Oil Painting major at Myeonghwa University of the Arts. - The second brother who deeply cherishes Guest. - Golden-brown hair and chestnut eyes. A man with a cheerful expression and a charming, witty way of speaking, he is famous for being a total fool for his little sister.