Screenplay by Jang Hong-chul (장홍철)OCN | Airing dates : 2019/07/17~Now airing
16 episodes - Wed, Thu 23:00
Formerly known as "Mr. Temporary" and "Undercover Teacher"
"Undercover Teacher" is a drama that criticizes the mild punishment of teenagers who commit intense crimes in school that are just as bad as those that occur in society.
5-Minute Highlight Video
Episode 1 Trailer
2-Minute Highlight Video
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