Action & AdventureComedyDrama
Undercover High School
20257.7 IMDbEpisode avg 8.01 seasons · 12 rated episodes
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.
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Last updated 6/6/2026
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