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 (4,493 votes)
Seasons: 1
Streaming (US): Rakuten Viki · OnDemandKorea · Kocowa Amazon Channel · Kocowa
Language: KO
Type: TV series

Browse seasons by rating shape → Open in Rising Shows app → View on IMDb

Ratings refreshed Jul 3, 2026 · 1 season indexed

Cast

Seasons

Season 1 (2025)

8.06 avg 12 episodes 7.8 → 8.2

Season 1 episodes — IMDb ratings
#	Title	Rating	Votes
1	The Emperor's Lost Gold	7.8	251
2	Spooky Stories	7.9	236
3	Ghost Story Riddles	8.2	223
4	Joining the Student Council	8.5	245
5	Student Council	8.0	183
6	Hae Seong's Father's Notebook	8.0	189
7	The 24th Anniversary of Byeongmun High	8.0	166
8	The Plan for VIP Students	8.2	167
9	The Mathematics Teacher	8.0	152
10	Retribution	7.9	155
11	The Devastating Truth	8.0	141
12	Where The Stars Lead	8.2	145