Undercover High School
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Undercover High School

7.7 / 10 | 1 Season | Korea
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.

Season 1

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Episode 01

Episode 02

Episode 03

Episode 04

Episode 05

Episode 06

Episode 07

Episode 08

Episode 09

Episode 10

Episode 11

Episode 12

Cast List (18)

Seo Kang-Joon
Seo Kang-Joon
Jeong Hae-seong
Jin Ki-joo
Jin Ki-joo
Oh Soo-ah
Min-joo Kim
Min-joo Kim
Lee Ye-na
Shin-rock Kim
Shin-rock Kim
Seo Myeong-joo
Yun Chae Bin
Yun Chae Bin
Yoon Chae-rin
Jeon Bae-soo
Jeon Bae-soo
Ahn Seok-ho
Jo Bok-rae
Jo Bok-rae
Go Young-hoon
Park Jin-Woo
Park Jin-Woo
Park Jae-moon
Kim Young-ah
Kim Young-ah
Soo-ah's Mother
Park Se-hyun
Park Se-hyun
Ahn Yoo-jeong
Yoon Ga Yi
Yoon Ga Yi
Park Mi-jeong
Lee Seo-hwan
Lee Seo-hwan
Kim Hyeong-bae
Min-ji Lee
Min-ji Lee
Kim Ri-an
Shin Joon-hang
Shin Joon-hang
Lee Dong-min
Lee Hyun So
Lee Hyun So
Han Seung-jae
Yong Oh
Yong Oh
Head teacher
Yu Ji-wan
Yu Ji-wan
Jeong Hae-seong (Child)
Joo Suk-tae
Joo Suk-tae
Seung-jae’s Father

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