Undercover High School (2025) Ep 3

Jung Hae Seong, an elite NIS agent faces demotion because of an incident that occurred during a mission. He is assigned to an operation to find the location of King Gojong’s missing gold bars. For this task, he hides his identity and goes undercover as a student at the prestigious Byeongmun High School, a school deeply corrupted by its obsession with wealth and power.There, he meets his homeroom teacher O Su A. Su A is a contract Korean history teacher with an upright personality and a strong affection for her students. She dreams of becoming a full-time teacher at Byeongmun High, but with Hae Seong, a new transfer student in her class, whom she finds herself entangled with, she quickly realizes that the path to achieve her goal won't be so easy.As Hae Seong navigates high school life, he uncovers the dark truth behind Byeongmun High. Teaming up with others, he fights back against corruption. His undercover operation, filled with excitement, is about to begin!


Genre: Action, Comedy, Romance, Crime.

Cast:   Seo Kang Joon,    Jin Ki Joo,    Kim Shin Rok.

 Episode 3