Undercover High School (2025)

Name: Undercover High School
Genre: Action, Comedy, Thriller
Rating: 7.7
Cast: Seo Kang-joon, Jin Ki-joo, Kim Shin-rock, Kim Min-ju, Yoon Ga-i

Action · Comedy · Thriller

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.

IMDb rating: 7.7 (4,656 votes)
Seasons: 1
Streaming (US): Rakuten Viki · OnDemandKorea · Kocowa Amazon Channel · Kocowa
Language: KO
Type: TV series

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Ratings refreshed Aug 19, 2026 · 1 season indexed

Cast

Seasons

Season 1 (2025)

8.12 avg 12 episodes 7.8 → 8.3

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
1	The Emperor's Lost Gold	7.8	261
2	Spooky Stories	8.0	244
3	Ghost Story Riddles	8.2	231
4	Joining the Student Council	8.5	253
5	Student Council	8.1	191
6	Hae Seong's Father's Notebook	8.1	197
7	The 24th Anniversary of Byeongmun High	8.0	174
8	The Plan for VIP Students	8.2	175
9	The Mathematics Teacher	8.1	160
10	Retribution	8.0	163
11	The Devastating Truth	8.1	149
12	Where The Stars Lead	8.3	152