Undercover High School

Released 2025 · Action & Adventure, Comedy, Drama · 1 season · ★ 8.0/10 · Created by Im Young-bin, Choi Jeong-in

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.