MBC’s highly anticipated drama Undercover High School has unveiled the first glimpse of Jin Ki Joo’s character, raising excitement for its upcoming premiere on February 21 at 9:50 p.m. KST.
Undercover High School is a comedy-action drama centered around National Intelligence Service (NIS) agent Jung Hae Sung (Seo Kang Joon), who goes undercover as a high school student to retrieve Emperor Gojong’s missing gold. While navigating the chaos of high school life, he encounters Oh Su Ah (Jin Ki Joo), an enthusiastic temporary Korean history teacher with dreams of securing a full-time position.
Jin Ki Joo takes on the role of Oh Su Ah, a dedicated and optimistic teacher willing to handle any task assigned by the vice principal. Her unwavering passion and infectious energy promise to add warmth and humor to the series.


Newly released stills showcase Oh Su Ah’s poised and charismatic presence in the classroom. Her confident stance and bright, determined expression reflect her commitment to both her students and her own aspirations. However, Su Ah’s strong sense of justice often gets her entangled in school affairs, leading to unexpected and hilarious situations.

Adding to the drama’s appeal, she shares a playful and bickering relationship with Jung Hae Sung, the mysterious transfer student whose arrival disrupts the usual order of her class.

The production team praised Jin Ki Joo’s performance, stating, “Jin Ki Joo is an actress with a wide range of charms. Her synergy with the lively, distinct character of Oh Su Ah will be phenomenal. Please look forward to Su Ah’s eventful school life and whether she will achieve her dream of becoming a full-time teacher.”
With a fresh mix of action, comedy, and engaging character dynamics, Undercover High School is shaping up to be a must-watch drama. Mark your calendars for February 21 and get ready for an entertaining ride!