Undercover High School (2025)

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 (4,812 votes)
Episode average: 8.1 ↑ +0.4 vs IMDb
Seasons: 1
Language: KO
Type: TV series

Rating trend: this show's seasons do not settle into one shape. Rising Shows ranks whole shows by the shape of their rating trend rather than one average score, which is how you find a show that got better rather than a show that started well.

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Ratings refreshed Oct 3, 2026 · 1 season indexed

Cast

Seasons

Season 1 (2025)

8.12 avg 12 episodes 7.8 → 8.3 67 min avg

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
1	The Emperor's Lost Gold	7.8	269
2	Spooky Stories	8.0	252
3	Ghost Story Riddles	8.2	239
4	Joining the Student Council	8.5	261
5	Student Council	8.1	199
6	Hae Seong's Father's Notebook	8.1	205
7	The 24th Anniversary of Byeongmun High	8.0	183
8	The Plan for VIP Students	8.2	183
9	The Mathematics Teacher	8.1	167
10	Retribution	8.0	170
11	The Devastating Truth	8.1	156
12	Where The Stars Lead	8.3	160