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Jul 01, 2026

‘Teach You a Lesson’ Director Hong Jong-chan and Star Kim Moo-yul on the Netflix Global Hit That Turned a Korean Classroom Into a World Stage: ‘Authenticity Is What Travels Borders’

When Netflix first greenlit a Korean series about a special-forces officer dispatched to intervene in school bullying cases, nobody expected it to end up in the living rooms of 91 countries. But “Teach You a Lesson” — now in its fourth consecutive week atop the platform’s Global Top 10 Non-English Series chart, with 7.3 million views in the week of June 22–28 alone — has done exactly that, racking up appearances in the Top 10 across markets as varied as Argentina, Germany, Japan, Malaysia and Australia.

Educators and parents from countries with no particular cultural overlap with Korea have been writing in to say they recognized their own schools on screen.

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For director Hong Jong-chan, the scale of that response remains genuinely disorienting. “It still doesn’t feel entirely real,” he says.

What Hong set out to make was something more modest in ambition: a story about the moment Korean society could no longer afford to look away from its schools. The systemic failures — teacher authority collapsing, bullying left to fester, institutions designed to resolve conflict instead protecting themselves — were the raw material. The fictional Educational Rights Protection Bureau, or ERPB, a covert squad of inspectors who intervene where official channels won’t, was the vehicle.

“In many ways, fantasy begins where reality becomes unbearable,” Hong says. “That simple idea became the foundation of my directing approach.”

The principle shaped every tonal decision on the show. Hong describes his guiding rule as keeping emotions realistic while making resolutions genre-driven. The pain of victims had to feel completely authentic, he explains, so that audiences would become invested — but when the ERPB moved to act, those sequences were calibrated for exhilaration, almost like an action film. Dark comedy served a parallel function. “Through satire,” he says, the underlying message could land with more sharpness than earnestness alone would allow. “The heavier reality becomes, the more powerful the catharsis of breaking through it with action.”

What Hong was most determined to avoid was the lone-hero structure that the premise could easily have defaulted to. The series builds its weight across an ensemble: Lee Sung-min as Choi Gang-seok, the Education Minister who founded the bureau and defends its purpose while under sustained public pressure; Jin Ki-joo as Im Han-rim, a junior inspector whose surface politeness gives way to something relentless in the field; and Pyo Ji-hoon as Bong Geun-dae, a KAIST-educated administrative officer who begins treating the job as just an assignment before the realities of school life draw him in. “Behind Na Hwa-jin’s overwhelming presence,” Hong says, “Choi Kang-seok quietly shoulders enormous responsibility. Im Han-rim fights alongside him on the front lines, while Bong Geun-dae brings warmth and humanity to the team. Each character stands with victims in their own way.”

Hong is careful to say the ERPB was never meant to be presented as a clean moral model. “The ERPB is a fantasy,” he says. “It’s an organization that would be difficult to imagine existing in reality, and some of its methods could certainly be controversial.” What interested him was the question the bureau’s existence poses rather than any answer it provides: when institutions fail, where does justice come from, and how much are people willing to sacrifice to stand beside victims? “I wanted viewers to wrestle with those questions themselves,” he says. “I believe stories that leave audiences thinking long after the credits roll are ultimately more meaningful than stories that provide all the answers.”

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