# Undercover High School Episodes 7 & 8 Recap: Jeong Hae-seong and Oh Su-ah’s First Mission Together URL: https://technosports.co.in/undercover-high-school-episodes-7-8-recap/ Published: 2025-03-17 Updated: 2025-03-17 Author: Reetam Bodhak [Undercover High School](https://en.wikipedia.org/wiki/Undercover_High_School), the gripping K-drama starring **Seo Kang-joon and Jin Ki-joo**, continues to escalate the tension as episodes 7 and 8 take viewers deeper into the mysterious world of **Jeong Hae-seong**, an undercover NIS agent disguised as a high school student. His mission to infiltrate the school and uncover a secret conspiracy takes an unexpected turn when his suspicious homeroom teacher, **Oh Su-ah**, gets involved. In these latest episodes, the duo embarks on their **first mission together**, uncovering shocking truths about **Seo Myeong-joo**, the school’s powerful director. As they navigate hidden puzzles, secret files, and a dangerous game of deception, Jeong Hae-seong must also come to terms with his past and find someone he can trust. Meanwhile, tensions rise among the students as conflicts over **academic corruption and secret agendas** start to surface. As the mystery deepens, Jeong Hae-seong and Oh Su-ah are **forced to rely on each other**, blurring the lines between duty, trust, and personal connections. With conspiracies unfolding at every turn, the latest episodes prove that **no one in this school is safe from the truth**. ![Undercover High School](https://images.technosports.co.in/2025/03/undders-1.webp) ## **Undercover High School Episodes 7 & 8** **: Oh Su-ah Joins Jeong Hae-seong’s Mission** Episode 7 kicks off with **Oh Su-ah making a bold decision**—she chooses to assist Jeong Hae-seong and the NIS team in solving the **third legendary mystery** of the school. Despite Jeong Hae-seong’s protests, she insists on proving that she can protect her students, just as much as any agent. Their first joint task takes them to **Seo Myeong-joo’s office**, where they play the piano in search of hidden clues. However, the investigation seems to hit a dead end when a **mysterious key produces no sound**. Just as they are about to abort the mission, Jeong Hae-seong stumbles upon a **startling revelation**—**Seo Myeong-joo is hiding a mole within the NIS**, manipulating agents to locate hidden gold bars for her. Realizing the **depth of corruption**, Jeong Hae-seong erases all traces of their presence in her office, setting the stage for a larger battle ahead. ## **A School Party Unveils Dark Secrets and Betrayals** The school’s **Byeongmun Night party** becomes the backdrop for several explosive confrontations. Seo Myeong-joo gathers parents of **elite students**, promising them **a future built on academic superiority**, while behind the scenes, students struggle with **friendships, betrayals, and buried secrets**. Lee Ye-na and Ahn Yu-jeong’s once-close friendship reaches a breaking point due to **Lee Ye-na’s growing arrogance**, which distances her from her peers. Meanwhile, **Jeong Hae-seong’s realization about the mole shakes his confidence in the mission**, leading to a **moment of vulnerability**. When Oh Su-ah **takes him out for a drink**, she urges him to **find at least one person he can trust**, assuring him that she is willing to be that person. Their conversation takes a shocking turn when **Jeong Hae-seong reveals his true identity as Jeong Shi-hyeon, her childhood friend from elementary school**. ![](https://images.technosports.co.in/2025/03/undders-2-1024x576.webp) ## **Seo Myeong-joo’s Corruption is Exposed** Meanwhile, **Lee Ye-na stumbles upon a conversation between Lee Seung-jae and his father**, where they discuss **tampering with student grades** to secure spots in Seo Myeong-joo’s elite “Edu-City” project. When Lee Ye-na confronts him, he reveals the **deep-rooted corruption** behind the school’s academic system—Seo Myeong-joo has been **manipulating grades for students with influential parents**, in exchange for their financial support. Oh Su-ah **discovers a mysterious card belonging to Lee Seung-jae**, which contains a **secret link to documents detailing the grade manipulation scheme**. Although she initially plans to return the card, curiosity gets the better of her, and she **opens the link**, exposing the full extent of the fraudulent system. She pleads with Jeong Hae-seong to help her gather evidence, but **he hesitates**, fearing that involvement in an unauthorized mission could lead to his expulsion. ![](https://images.technosports.co.in/2025/03/undders-3-1024x576.avif) ## **Jeong Hae-seong Risks Everything to Protect Oh Su-ah** As tensions mount, Jeong Hae-seong **sees his sister, Ahn Yu-jeong, working tirelessly to become an agent like him**. Motivated by his **duty to protect her**, he finally decides to **help Oh Su-ah find proof of the scandal**. That night, he secretly **places a tracker under a restaurant table** where Seo Myeong-joo, Lee Seung-jae, and his father meet to discuss their plans. Through this, he learns that **Seo Myeong-joo has discovered Oh Su-ah’s investigation and plans to eliminate her**. Realizing the imminent danger, Jeong Hae-seong **rushes to the school**, where Oh Su-ah is digging through old documents. He convinces her to **leave with him immediately** for her safety. Meanwhile, his superior, **Ahn Seok-ho, is furious at his divided attention**, demanding that he **focus solely on his official mission**. Their confrontation escalates, leading to a **direct order from Ahn Seok-ho to abandon everything else**. ## **An Intruder Strikes: Oh Su-ah’s Life is in Danger** As Jeong Hae-seong grapples with his next move, **Seo Myeong-joo intensifies her plans**. She instructs the mole to **eliminate Jeong Hae-seong**, suspecting that he **knows too much about the hidden gym and its secrets**. Meanwhile, Lee Ye-na, **tormented by guilt**, visits Ahn Yu-jeong’s house after **arguing with Seo Myeong-joo about the grade scandal**. In the final moments of episode 8, **Jeong Hae-seong returns home only to find Oh Su-ah lying unconscious on the floor**, a sign that someone had **broken in while they were working together**. With **the stakes now higher than ever**, the fight for the truth is no longer just about exposing corruption—it’s about survival. ## **Final Thoughts: The Battle for the Truth Has Just Begun** Episodes 7 and 8 of **Undercover High School** take the drama to a new level, blending **espionage, academic corruption, and deep personal stakes**. As **Jeong Hae-seong and Oh Su-ah get closer to the truth**, they find themselves entangled in a **dangerous game where trust is scarce, and betrayal lurks in every corner**. With **Oh Su-ah’s life in danger and Jeong Hae-seong now a target**, the next episodes promise even more **shocking revelations and high-stakes action**. Will they be able to expose Seo Myeong-joo before it’s too late? **[Blackpink Jisoo Teases Fans with Exclusive ‘Newtopia’ Behind-the-Scenes Photos](https://technosports.co.in/blackpink-jisoo-teases-fans-newtopia-bts/)** ## **FAQs** ### **1. Where can I watch Undercover High School episodes 7 & 8?** Undercover High School airs every **Friday and Saturday at 9:50 pm KST on MBC**. International viewers can stream the episodes on **Viki, Kocowa, and Rakuten V**. ### **2. What did Jeong Hae-seong discover about Seo Myeong-joo?** Jeong Hae-seong found out that **Seo Myeong-joo has a mole inside the NIS**, manipulating agents to **find hidden gold bars**. She is also involved in **tampering with student grades** for personal gain. ### **3. What happened to Oh Su-ah at the end of episode 8?** Oh Su-ah was **attacked by an intruder** while investigating Seo Myeong-joo’s secrets. **She was found unconscious** by Jeong Hae-seong, leaving her fate uncertain.