Undercover High School · SEASON 1

The Mathematics Teacher

Episode 9 · 2025-03-21

★ 9.0
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Season 1Episode 9★ 9.0/10
  • Action & Adventure
  • Comedy
  • Drama

Episode overview

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.

68 minutes

Season 1 episodes

1. The Emperor's Lost Gold2025-02-21 2. Spooky Stories2025-02-22 3. Ghost Story Riddles2025-02-28 4. Joining the Student Council2025-03-01 5. Student Council2025-03-07 6. Hye Seong's Father's Notebook2025-03-08 7. The 24th Anniversary of Byeongmun High School2025-03-14 8. The Plan for VIP Students2025-03-15 9. The Mathematics Teacher2025-03-21 10. Retribution2025-03-22 11. The Devastating Truth2025-03-28 12. Where The Stars Lead2025-03-29