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Undercover High School

Season 1, episode 9. This player now records resume state for the active profile so browse, account, and detail pages can bring you back here quickly.

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S1 E9

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.

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Season 1

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Episode 1: The Emperor's Lost Gold

Episode 2: Spooky Stories

Episode 3: Ghost Story Riddles

Episode 4: Joining the Student Council

Episode 5: Student Council

Episode 6: Hye Seong's Father's Notebook

Episode 7: The 24th Anniversary of Byeongmun High School

Episode 8: The Plan for VIP Students

Episode 9: The Mathematics Teacher

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Episode 10: Retribution