Rookie Cops

Cha Yoo-gon, a witty police science professor who as a police officer had run wild in the past without fear of the world before an incident changed his outlook on life.

Kim Hyun-soo, a fourth-year student at KNPU and Kim Tak's older brother.

Choi In-sik.

Baek Sun-yu, head of the female student dormitory is also active in school activities, such as training and student council.

Um Hyuk, a strict principled upperclassman and the head of the police academy's education team in charge of training new students.

Kim Soon-young, the university dean.

Woo Ju-young, a freshman from a science high school who dreams of becoming a forensics investigator.

Chu Man-seok, a heinous character who commits evil acts.

The profile picture for Yoo Dae-il's blind date.

Go Eun-kang, is active and courageous, she is a troublemaking freshman who enters the police force to chase after an unrequited love and manages to enter the police university after being rejected at first. Oh Ah-rin as young Go Eun-kang.

Young Go Eun-kang.

Wi Seung-hyun, a passionate youth who cannot stand seeing injustice, he aims to follow in the footsteps of his father who is the head of the Gyeonggi Dongbu Police Agency. He places first on the college entrance exam on his second attempt.

Kim Tak, a freshman from the junior national judo team who embodies the spirit and passion of youth, is accustomed to being alone but Wi Seung-hyun becomes his one true friend. Choi Yoon-woo as young Kim Tak.

Seo Bum-ju, a sincere and upright freshman who sometimes has excessive thoughts and worries that reveal a timid side; he is meticulous with planning and has unexpected dance skills.

Kang Nam-gi, a passionate detective struggling to find the truth of the case.