Emotional Moments in 'Undercover High School' as Seo Kang-joon and Jin Ki-joo's Characters Face Danger

In the latest episode of MBC's Friday-Saturday drama 'Undercover High School,' Seo Kang-joon (정해성) and Jin Ki-joo (오수아) shared poignant moments that captivated viewers. On March 21, the episode showcased a tense scene where 정해성 rushed 오수아, who had been stabbed, to the hospital. After her surgery, he stayed by her side, expressing his guilt, saying, 'I'm sorry for not being able to protect you.' Upon waking, 오수아 smiled and replied, 'If you're that sorry, treat me better.' He responded with concern, asking, 'Are you okay? I was worried. I'm glad you're safe.' During this exchange, 오수아 revealed that their colleague, 이준호 (노종현), was involved in the school's internal corruption.

Simultaneously, 정해성 discovered that 이준호 was also the assailant. Shocked, he returned home to ponder why 이준호 had broken in, realizing it was to obtain his father's notebook, which he suspected was linked to 서명주 (김신록).

Meanwhile, 서명주 attempted to extract information about the final urban legend from the notebook but failed. He later plotted to eliminate 이준호 through the principal, 박재문 (박진우), but that plan also fell through due to 정해성's interference.

As the story unfolded, 정해성 began to suspect that 안팀장 (전배수) might be a mole for 서명주. After clearing up the misunderstanding, he shed tears of regret and vowed to complete the mission of agent 정재현 from 22 years ago, stating, 'I will find everything, including the gold bars and my father.'

Following 이준호's confession, 박재문 faced charges of attempted murder, while 서명주 was arrested for corruption and conspiracy to commit murder. The identity of 서명주's accomplice was revealed to be 김국장 (이서환), who expressed concern over the deteriorating situation and the potential loss of his position.

In a surprising twist, as 정해성 focused on solving the final urban legend at school, 이동민 (신준항) mentioned a bizarre curse that caused people to vanish without a trace. Just when things seemed calm, 서명주 and 박재문 returned to the school, shocking everyone. 서명주 warned 오수아 to be more careful after hearing about her near-death experience.

The episode concluded with a teaser showing 정해성, now expelled from school, resuming his mission as a National Intelligence Service agent. In a heartfelt moment, he confessed to 오수아, 'I like you. A lot,' leaving viewers eager for the next developments.