Undercover High School

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.

Cast & crew

Choi Jeong-in · Seo Kang-joon · Kim Seung-beom · Kim Sun-min · Im Young-bin · Yun Chae-bin · Jin Ki-joo · Kim Min-ju · Yoon Ga-i · Lee Hyun So · Kim Shin-rock · Kim Young-ah