Seo Kang Joon is coming with an exciting comedy action Korean drama, “Undercover High School,” alongside Jin Ki Joo and other talented cast members, and is set to premiere this February. Check out the details of the upcoming Korean drama below.
New KDrama “Undercover High School”: Plot, Cast, and Premiere Date

The new Korean drama “Undercover High School” is the comeback project of actor Seo Kang Joon following his military discharge in May 2023. The drama is also one of the highly anticipated dramas this year.
Explore the details of the upcoming Kdrama “Undercover High School,” including the exciting plot, release date, and cast lineup.
Storyline
Jung Hae Sung is a reliable and talented National Intelligence Service (NIS) field agent. However, after a major incident during a field operation, he got a demotion and received a new assignment to find the missing gold bars of King Gojong. For this assignment, he must infiltrate the prestigious Byeongmun High School, not as a teacher but as a student.
At the school, he meets Teacher Oh Soo Ah, the temporary Korean history teacher, and his homeroom teacher. Hae Seong reminds her of her first love when she was a little girl, which left her with a deep wound in his heart.
During his undercover mission, Jung Hae Sung accidentally gets involved in various incidents that occur at school. He moved to help his friends at school. However, with everything that happens at school, will he complete his mission without being caught?
“Undercover High School” Cast Members
Seo Kang Joon as Jung Hae Sung

Jung Hae Sung is a skilled agent of NIS with an energetic and playful personality. Following his demotion, he receives a new mission and has to go undercover as a high school student. During his mission, he struggles to fit in and even gets involved in the incidents at the school.
Jin Ki Joo as Oh Soo Ah

Oh Soo Ah is a dedicated temporary teacher with an unwavering passion for becoming a full-time teacher. She loves her students and her job. However, behind her cheerful personality, there is a deep wound in her heart.
Kim Shin Rok as Seo Myung Joo

Seo Myung Joo is the chairwoman of Byungmun High School and the head of the Byeongmun Foundation. With strong charisma and authority, she shows her great power over the school. Her vigilance and presence stand out over Jung Hae Sung’s presence, arousing curiosity about what really happens within the school walls.
Other cast members
- Kim Min Ju as Lee Ye Na
- Yoon Ga Yi as Park Mi Jung
- Kim Young Ah as Oh Soo Ah’s mother
- Lee Hyun Soo as Han Seung Jae
- Lee Seo Hwan as Kim Hyung Bae (Director of NIS)
- Park Se Hyun as Ahn Yoo Jung (Jung Hae Sung’s assistant)
- Jun Bae Soo as Ahn Suk Ho
- Jo Bok Rae as Go Yung Hun
“Undercover High School” Release Date
The Korean drama “Undercover High School” will premiere on MBC on February 21, 2025. The series will come in 12 episodes, with new episodes airing every Friday and Saturday.
Check out the firstl trailer of “Undercover High School” below.
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