First Teaser Trailer added for the Dramatic series MBC “Undercover High School” with Seo Kang-Joon and Jin Ki-Joo. The dramatic series “Undercover High School” follows the agent of Nis Demo Jung Hae-Seong (SEO Kang-Joon) while it begins an infiltration operation in a high school. The trailer begins with an anonymous voice asking “can you assume the responsibility of what you said about doing everything?” And around the 5 second brand, Seo Kang Joon answers “What should I do first?” And the anonymous voice responds to the 7 second brand with “now, you will be a secondary student”.

“Undercover High School” will be broadcast for the first time on February 21, 2025 in South Korea.

Draw the synopsis by Asianwiki: Jung Hae-Seong (SEO Kang-Joon) is an AS agent for the National Intelligence Service (NIS). After a big incident occurred during an operation, Jung Hae-Seong receives a demotion. It is placed in an operation to locate the fate of the missing golden bars of King Gojong. For this mission, he hides his identity and goes under cover as a student at the prestigious Byeongmoon high school. There he meets Professor Oh Soo-A (Jin Ki-Joo) as a bedroom teacher.

Oh Soo-A is a contractual Korean history teacher with a right personality and has a strong affection for her students. One day, Jung Hae-Seong is transferred to the Byeongmoon high school and she becomes her bedroom teacher. She begins to see her first love, since her childhood days, overlaps in Jung Hae-Seong. His first love made him heart the greatest injury.