MBC's new Fri-Sat drama 'Undercover High School' has unveiled a dramatic series of character posters starring Seo Kang Jun, Jin Ki Joo, and Kim Shin Rok. 

Premiering next month on February 21 at 9:50 PM KST, 'Undercover High School' tells the story of a special agent who receives orders to go undercover as a high school student in order to track the whereabouts of stolen national treasure. 

First, Seo Kang Jun shows off his strut as the new transfer student Jung Hae Sung in his character poster. While he looks the part for a high school student, his sharp and calculating gaze suggests that he has a hidden mission. Next, Jin Ki Joo wears a warm smile in the school library as Oh Soo Ah, Jung Hae Sung's homeroom teacher. Lastly, Kim Shin Rok takes on the role of Seo Myung Joo, an observer who watches over everything. 

Also starring Kim Min Ju, Yoon Ga Yi, and more, 'Undercover High School' is coming soon to MBC!

SEE ALSO: 'Undercover High School' unveils new still cuts of Seo Kang Jun and Jin Ki Joo before premiere