Seasons and episodes
1Season 1 Feb. 21, 2025
1 - 1The Emperor's Lost Gold Feb. 21, 2025
1 - 2Spooky Stories Feb. 22, 2025
1 - 3Ghost Story Riddles Feb. 28, 2025
1 - 4Joining the Student Council Mar. 01, 2025
1 - 5Student Council Mar. 07, 2025
1 - 6Hye Seong's Father's Notebook Mar. 08, 2025
1 - 7The 24th Anniversary of Byeongmun High School Mar. 14, 2025
1 - 8The Plan for VIP Students Mar. 15, 2025
1 - 9The Mathematics Teacher Mar. 21, 2025
1 - 10Retribution Mar. 22, 2025
1 - 11The Devastating Truth Mar. 28, 2025
1 - 12Where The Stars Lead Mar. 29, 2025
Creator
Creator
Cast
Jeong Hae-sung
Oh Su-ah
Seo Myung-ju
Lee Ye-na
Park Mi-jung
Im Chung-ha
Han Seung-jae
Video trailer
Synopsis
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. 
Original title 언더커버 하이스쿨
TMDb Rating 7.9 51 votes
First air date Feb. 21, 2025
Last air date Mar. 29, 2025
Seasons 1
Episodes 12
Average Duration 70 minutes
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