Choi Soo-young

A young breadwinner who started working at a factory at the age of 18 to take care of her younger sister. She is a person who will do anything to save her sister from danger, even if it means her own death. It appears she suffered from domestic violence and even sexual abuse while living with her father. Currently, she is attending school under the alias Lee Eun-seo to save her sister. Extremely beautiful woman. Enrolled in Jeonghan High School under a pseudonym. Cold and haughty personality.

Seo Ho-su

Ranked 3rd in Class S of the 3rd year at Jeonghan High School. He is the 'Jeonghan High Pushover' who is exploited by his classmates all day long. Despite difficult circumstances such as his mother's battle with cancer and his father's disappearance, he maintains top-tier grades through hard study. Male.

Yoo Seong-pil

An entrance exam consultant. The best underground consultant who partners with legal, unethical, and illegal means to ensure students achieve their dreams. He is an undercover former police officer. Male.

Choi Min-young

Choi Soo-young's younger sister. Like Soo-young, she has been a victim of child abuse. Female.

Choi Soo-young and Choi Min-young's Father

The father of Choi Soo-young and Choi Min-young, and a criminal-like father who committed abuse. Male.

Park Hee-jin

A character who grew up with nothing to lack: looks, grades, wealth, a harmonious family, and popularity. After being flatly rejected by her first love, Song Jin-woo, she struggles to find out the reason but falls deeper into confusion. Female.

Song Jin-woo

The golden boy of Jeonghan High School with top popularity and top grades. He is a character who acts as he pleases within the school, utilizing his privilege as the chairman's grandson. It has been revealed that he is terminally ill. Male.

Jo Won-ju

The general manager of the High Cookie manufacturing and distribution organization. The self-proclaimed right hand of the Chef. The only person who knows the Chef's phone number. Choi Min-young calls her 'Auntie.' Extremely beautiful woman. Psychopathic tendencies?

Jjik-jjik-i

A person who manufactures cookies inside the laundry room and carries out the Chef's orders.

Moon Gyu-nam

Team leader at Songrim Ice Pack Factory. Male. Showed abnormal symptoms after eating a High Cookie. He even almost sexually harassed Choi Soo-young.