Director: Choi Jeong-in
Cast: Seo Kang-joon, Jin Ki-joo, Kim Shin-rock, Kim Min-ju, Yoon Ga-i
Undercover High School is a 2025 South Korean action-comedy thriller series directed by Choi Jeong-in, starring Seo Kang-joon as an elite intelligence agent forced to go undercover inside a high school. Blending spy intrigue with romantic comedy and teen drama, it delivers sharp humour alongside genuine suspense.
What is Undercover High School about?
Jung Hae-seong is one of the National Intelligence Service's most capable field operatives — quick-thinking, highly trained, and accustomed to high-stakes assignments. A botched mission strips him of his rank and lands him in the most unlikely of cover identities: a student at an ordinary secondary school. His real objective is to track down a cache of gold connected to the historical King Gojong. Inside the school, however, complications multiply fast. A teacher named Oh Soo-ah crosses his path and becomes convinced he is the first love she lost years ago. As Hae-seong tries to keep his mission on track without blowing his cover, old emotions stir on both sides, and the line between performance and feeling starts to blur.
Cast & crew
Seo Kang-joon leads as the straight-faced spy navigating adolescent chaos, bringing physical comedy and dramatic weight in equal measure. Jin Ki-joo plays Oh Soo-ah with warmth and a bittersweet edge that grounds the romantic subplot. Kim Shin-rock, Kim Min-ju, Yoon Ga-i, Kim Young-ah, and Lee Hyeon-so round out a lively ensemble that gives the school setting genuine texture.
Context & significance
Korean drama has built a passionate viewership across the Iranian diaspora over the past decade — series blending action, romance, and humour travel particularly well. Undercover High School sits squarely in the beloved K-drama tradition of placing a fish-out-of-water hero in an everyday setting where both comedy and real stakes coexist. Its spy-versus-school-life premise draws on the same energy that made shows about unlikely infiltrators so rewatchable. For Persian-speaking viewers the series is available with a full Persian dub, meaning you can follow every twist and one-liner without missing a beat. The 70-minute episode format makes it easy to watch in one sitting or split across an evening.
Where & how to watch
Undercover High School is available on K-Time with a full Persian dub and Persian subtitles. Watch on the web, on your TV, or on your phone — no VPN needed, no geo-blocking, no extra download required. Subscribe and cancel anytime.