- HD 1080
- Runtime: m.
- Status: Ended
0
- Languages: ko
- Country: South Korea
- Stars: Seo Kang-joon, Jin Ki-joo, Kim Shin-rock, Kim Min-ju, Yoon Ga-i
- keywords: undercover agent, romcom, romance
- Seasons: 1
- Episodes: 12
- First air date: 2025-02-21
- Last air date: 2025-03-28
- providers: Kocowa, Rakuten Viki, OnDemandKorea
- The Undercover High School is featured in the top rankings of 2025
- #1 in Top Comedy Series of 2025
- #3 in Top Drama Series of 2025
Ace NIS agent Jung Hae-seong is demoted after a mission failure. He goes undercover at a high school to locate King Gojong's missing gold, meeting his teacher Oh Soo-ah, who sees him as her lost first love, stirring old heartbreak.
