31-Year-Old Seo Kang-joon Looks Younger Than Ever in a School Uniform

MBC’s highly anticipated Friday-Saturday drama Undercover High School (written by Im Young-bin, directed by Choi Jung-in) is set to premiere on February 21 at 9:50 p.m. On February 7, the production team unveiled still cuts of Seo Kang-joon in character as Jung Hae-sung, a National Intelligence Service (NIS) agent who goes undercover as a high school student, sparking excitement among fans.

Undercover High School follows Hae-sung, a top NIS agent tasked with infiltrating a high school to track down the lost gold treasure of Emperor Gojong. The undercover mission turns chaotic as he navigates high school life while trying to fulfill his dangerous mission. Packed with action, suspense, and unexpected turns, the drama promises to be a wild ride.

Impressive Visuals and a Youthful Transformation

The stills highlight Seo Kang-joon’s undeniable charm and youthful appearance. In one image, he effortlessly pulls off the school uniform, flashing a soft smile that contrasts with his chic and rebellious vibe as he rides a motorcycle. Another shot shows him leaning on his hand while reading a book, exuding classic boy-next-door charm.

However, when he switches to his role as an undercover agent, the atmosphere shifts dramatically. His sharp gaze and the tension in his expression hint at the high stakes of his mission, leaving viewers curious about the challenges he will face. In one striking scene, he’s seen wearing a suit, fully immersed in the mission, and exuding intensity that heightens the drama’s suspense.

Jung Hae-sung’s mission involves more than just tracking down treasure—it also places him in complex relationships with the people around him. As he navigates life as a student, he gets entangled with classmates and key figures at the school, including his homeroom teacher Oh Soo-ah (played by Jin Ki-joo) and the school’s chairman Seo Myung-joo (played by Kim Shin-rok). These interactions will drive much of the drama’s intrigue and emotional depth.

Seo Kang-joon’s Return to the Screen

The role marks Seo Kang-joon’s highly anticipated comeback following his discharge from military service in 2023. His absence from the screen left fans eagerly awaiting his next project. Known for his breakout role in Cheese in the Trap alongside Kim Go-eun, where his looks and performance earned widespread recognition, Seo’s return has already generated significant buzz.

With Undercover High School, Seo Kang-joon is expected to captivate audiences once again, blending his signature charm with a new level of maturity and intensity. Fans can look forward to a performance that combines action, suspense, and emotional nuance, making the show a must-watch for K-drama enthusiasts.

Be sure to catch the premiere of Undercover High School on February 21 at 9:50 p.m. on MBC.