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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.
Undercover High School is a television series from 2025, available to stream online across all seasons and episodes. Optimized for mobile, tablet, and desktop.
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Seasons
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Undercover High School
The Emperor's Lost Gold
Undercover High School
Spooky Stories
Undercover High School
Ghost Story Riddles
Undercover High School
Joining the Student Council
Undercover High School
Student Council
Undercover High School
Hye Seong's Father's Notebook
Undercover High School
The 24th Anniversary of Byeongmun High School
Undercover High School
The Plan for VIP Students
Undercover High School
The Mathematics Teacher
Undercover High School
Retribution
Undercover High School
The Devastating Truth
Undercover High School
Where The Stars Lead
Popular TV Coming Soon
2 upcoming shows
Upcoming Action & Adventure Shows
1 titles
More by Cast
Seo Kang-joon & Jin Ki-joo
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