Full cast of Undercover High School

Seo Kang-joon

Jeong Hae-sung

12 episodes

Jin Ki-joo

Oh Su-ah

12 episodes

Kim Shin-rock

Seo Myung-ju

12 episodes

Kim Min-ju

Lee Ye-na

12 episodes

Yoon Ga-i

Park Mi-jung

12 episodes

Kim Young-ah

Im Chung-ha

12 episodes

Lee Hyun So

Han Seung-jae

12 episodes

Yun Chae-bin

Yun Chae-rin

12 episodes

Kim Sun-min

Ji Hyeon-jun

12 episodes

Kim Seung-beom

Kim Ho-jin

12 episodes

Kang Pil-jun

Son Beom-Sik

12 episodes

Su Hyun

[Student]

1 episode