79%
Canada 
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We couldn’t find any streaming options in New Zealand, but Undercover High School is available in the United States and 12 other countries on Rakuten Viki, OnDemandKorea, and 5 other services.
Ace NIS agent Jung Hae-seong is demoted after a mission failure. He goes undercover at a high school to locate King Gojong's missing gold, meeting his teacher Oh Soo-ah, who sees him as her lost first love, stirring old heartbreak.
