Editorials 
Episode Title: The Mathematics Teacher
As Su A recovers in the hospital following the attack during the break-in, Hae Seong and the team uncover the culprit: Lee Jun Ho, the mathematics teacher. When Hae Seong detects his father's notebook missing, he realizes that Seo Myeong Ju orchestrated the break-in. After Lee Jun Ho's arrest and confession, the revelation of the school's grade-rigging scandal throws the institution into chaos. Amid the turmoil, Hae Seong stumbles upon a crucial clue to the final scary story.
(Source: Viu)
- Aired: March 21, 2025
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Undercover High School Episode 9 Reactions
Both actors seo kang joon and jin ki joo Your acting was truly amazing! I loved watching your perform. Your expressions,action scene, movements,emotion and tone of voice were all perfect. You made the story feel real and relatable.I appreciate the hard work your put into your role.I look forward to seeing more of your performances.
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Omg! This week episodes are sooooo good. The last two episodes next week hopefully writers end it with a BOMB!
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o alivio dele e o meu ao saber que o tio realmente não está envolvido A SU A É A MELHOOOOR tava tudo lindo demais pra ser verdade mesmo O EPÍLOGOOOOO EU AMO MEU CASAL AAAAA
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