Undercover High School poster

Undercover High School

★ 7.7 5K votes 2025–2025 1 season · 12 episodes Ended MBC
School & campusSchools and universities as the primary world.This show: 8/10Outsider leadA misfit or newcomer as our way into the world.This show: 7/10Secrets & liesHidden truths straining every relationship.This show: 7/10
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Starring
Seo Kang-joonJin Ki-jooKim Min-juKim Shin-rockYun Chae-binJeon Bae-soo
Starring
Seo Kang-joonJin Ki-jooKim Min-juKim Shin-rockYun Chae-binJeon Bae-soo
Ratings per Episode
246810
Votes per Episode
075150225300

Undercover High School Episode Ratings Heatmap

AvgE1E2E3E4E5E6E7E8E9E10E11E12
S18.17.88.08.28.58.18.18.08.28.18.08.18.4

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About

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.

All Seasons

▼
Season 12025
8.12K123h 21m
EpTitleRatingYoursVotesRuntime
▶1The Emperor's Lost Gold7.8
27170 min
▶2Spooky Stories8.0
254—
▶3Ghost Story Riddles8.2
241—
▶4Joining the Student Council8.5
26365 min
▶5Student Council8.1
201—
▶6Hae Seong's Father's Notebook8.1
207—
▶7The 24th Anniversary of Byeongmun High8.0
185—
▶8The Plan for VIP Students8.2
185—
▶9The Mathematics Teacher8.1
170—
▶10Retribution8.0
17366 min
▶11The Devastating Truth8.1
159—
▶12Where The Stars Lead8.4
164—

Full Cast & Crew

Cast

Seo Kang-joon Jeong Hae-seong
Jin Ki-joo Oh Soo-ah
Kim Min-ju Lee Ye-na
Kim Shin-rock Seo Myeong-joo
Yun Chae-bin Yoon Chae-rin
Jeon Bae-soo Ahn Seok-ho
Kim Young-ah Soo-ah's Mother
Jo Bok-rae Go Young-hoon
Park Jin-woo Park Jae-moon
Park Se-hyun Ahn Yoo-jeong

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