Cho Seung-yeon

Na Man-seok • 12 episodes

Seong Hyeon-guk • 5 episodes

Yoon Jeong-ki • 12 episodes

Yongchul

Apt. 702 Resident

Seong In-jae • 12 episodes

dean of academic affairs (Yu-seong Tech) • 10 episodes

Kang Il-chan • 4 episodes

Wu Cheol-yong • 12 episodes

Homeroom teacher • 1 episodes

Kwak Se-hwan • 16 episodes

Choi Han • 2 episodes

Chun Soo-beom • 12 episodes

Kyeong Geun-jik • 21 episodes

Kim Unbu • 32 episodes

Golf club member / Airplane passenger

Jo Wan-gyu • 12 episodes

Jin Chul-joong • 24 episodes

Bae PD / Bae Cheol-ho • 16 episodes

Lee Byeok

Oh Hyun-chul • 16 episodes

Ju Jeon • 24 episodes

Yoo Jeong-ryeol • 16 episodes

No Young-Seok • 40 episodes

Police Station Section Head Chief • 16 episodes

King Sun-Jo • 16 episodes

Lee Chun-bo

Detective Jo

Prosecutor Choi • 1 episodes

Assistant General Prosecutor Kim Geun-Soo • 1 episodes

Min Young-hwan

Detective Jo

Park Yoon-Ho's father • 1 episodes

Dong Ja-seung's Father

Male Student Protester

Grocery store clerk

Jae-hyeok

Special Investigation Team