Undercover High School (Korean: 언더커버 하이스쿨) is an ongoing South Korean action comedy spy television series written by Im Young-bin [ko], directed by Choi Jung-in, and starring Seo Kang-joon, Jin Ki-joo, and Kim Shin-rok.

Jeong Hae-seong, an NIS agent who was demoted after a major incident that occurred during an operation, and later he is tasked with a special mission of tracking down the whereabouts of Emperor Gojong's missing gold bars.

Su-a, a devoted teacher to her students, begins to notice the similarities between Hae-seong and her childhood first love, who left her heartbroken and filled with painful memories.

The series began its production and is planned by Namkoong Seong-woo, written by Im Young-bin [ko], directed by Choi Jung-in, and produced by Neo Entertainment and Slingshot Studios.

[20] In March 2024, Seo Kang-joon was reportedly in talks as the lead actor and his agency told the media that he was positively reviewing it.