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.
Jung Hae Seong is an ace field agent for the National Intelligence Service (NIS). After a big incident occurred during an operation, Jung Hae Seong receives a demotion. He is placed into an operation to locate the whereabouts of King Gojong’s missing gold bars. For this assignment, he hides his identity and goes undercover as a student at the prestigious Byeongmoon High School. There, he meets Teacher O Su A as his homeroom teacher.

Su A is a contract Korean history teacher with an upright personality and she holds strong affection for her students. One day, Hae Seong is transferred to Byeongmoon High School and she becomes his homeroom teacher. She begins to see her first love, from her childhood days, overlap with Jung Hae Seong. Her first love caused the biggest wound to her heart.
Undercover High School Online Free Watch Subtitrat Romana
Povestea îl urmărește pe Jung Hae-seong, un agent de elită al Serviciului Național de Informații (NIS), care, după un eșec într-o misiune, este retrogradat și însărcinat cu o misiune secretă: să găsească lingourile de aur dispărute ale regelui Gojong. Pentru a-și îndeplini misiunea, el se infiltrează sub acoperire ca elev la prestigiosul liceu Byeongmun. Acolo, o întâlnește pe Oh Soo-ah, diriginta sa, care îl consideră prima ei iubire pierdută, ceea ce reaprinde vechi răni emoționale. Sursa: AsianWiki