Fair rating?Undercover High School· Season 1 · Episode 9
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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#1In Season 1of 12 rated episodes
#1All-timeof 12 rated episodes
+0.7vs season avgSeason 1 averages 8.3
2025First airedMarch 21, 2025
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