When Netflix first greenlighted a Korean series about a special forces officer sent to intervene in a school bullying incident, no one expected it to end up in the kitchens of 91 countries. But “Teach You a Lesson” has now done just that, topping the platform’s Global Top 10 Non-English Series chart for four consecutive weeks, racking up 7.3 million views in the week of June 22-28 alone, and hitting the top 10 in markets as diverse as Argentina, Germany, Japan, Malaysia and Australia.
Educators and parents from countries with no significant cultural overlap with South Korea wrote in to say they recognized their schools on the screen.
For director Hong Jong-chan, the magnitude of the reaction is still really confusing. “It still doesn’t feel completely surreal,” he says.
Mr. Hong set out to create a more modest ambition, a story about the moment when Korean society could no longer turn away from school. The ingredients were systemic failures: a breakdown in teacher authority, bullying left to fester, and a system designed to resolve conflicts instead of protecting them. The fictitious Educational Rights Protection Bureau (ERPB) is a secret surveillance force that intervenes where official channels do not.
“In many ways, fantasy begins where reality becomes unbearable,” Hong says. “That simple idea became the basis of my directorial approach.”
This principle shaped every tonal decision in the show. Hong explains that his guiding principle is to keep the emotions realistic while basing his solutions on genre. He explains that in order for the audience to be immersed, the victims’ pain needed to feel completely authentic. But when ERPB sprang into action, those sequences were tailored for exhilaration, almost like an action movie. Dark comedy also worked in parallel. “Through satire,” he says. The underlying message can come across more acutely than seriousness alone would allow. “The heavier the reality, the more powerful the catharsis of breaking through it through action.”
What Hong was most determined to avoid was the structure of a lonely protagonist, which the premise could easily fall into. This series focuses on the ensemble as a whole. Lee Sung-min plays Choi Kang-seok, the Minister of Education who founded the Bureau of Education and defended its goals under sustained public pressure. Jin Ki-joo: A young police inspector who plays Im Han-rim. Civility on the surface gives way to ruthlessness in the field. “Behind Na Hwa-jin’s overwhelming presence, Choi Kang-seok is quietly shouldering a great responsibility. Lim Han-rim fights alongside him on the front lines, and Bong Geun-dae brings warmth and humanity to the team. Each character stands by the victim in their own position,” Director Hong said. method. ”
Hong is careful to say that the ERPB was never intended to be presented as a clean moral model. “ERPB is an illusion,” he says. “This is an organization that is difficult to imagine actually existing, and some of its methods can certainly be controversial.” He was interested not in the answers the Bureau provided, but in the questions its existence raised. When the system is broken, where does justice come from? How much are people willing to sacrifice to be there for the victims? “I wanted viewers to wrestle with those questions themselves,” he says. “I believe that stories that leave the audience thinking long after the credits have finished are ultimately more meaningful than those that provide all the answers.”
Kim Moo-yeol, who plays ERPB supervisor Na Hwa-jin, approached the character’s ethical ambiguity with similar care. He resists both the hero and antihero labels. “If a hero is someone who saves victims and delivers justice, Hwa-jin is more of a person driven by a sense of responsibility, someone who gives others the opportunities and guidance they need to move forward in life,” Kim says. He added that the character also doesn’t fit into the antihero category, as he’s not motivated solely by personal desire. “Actually, I’m very interested in how viewers will interpret Na Hwa-jin,” Kim says.
He explains that he was drawn to the role precisely because the character has unresolved damage. “He was a victim himself and chose to reach out and help other victims,” Hong said. “That’s where his real strength lies.” A perfect hero would be far less convincing, Hong argues. “Kim Mu-yeol captured that aspect of the character beautifully. He not only brought the qualities that audiences already associated with him, but also revealed new sides of himself that we had never seen before.”
Achieving that interiority required as much preparation as the show’s big action sequences. Kim says she spent more time contemplating the scene with the victim than the physical confrontation, which is the series’ most cropped moment online. “We needed to understand the victim’s situation while conveying Na Hwa-jin’s personality, and we worked hard to find the right balance, not being too emotional or too cold.” In contrast, in the confrontation with the perpetrator, the challenge was to convey decisiveness and a commanding physical presence. Because the character is from a special forces background, Kim adjusted Na Hwa-jin’s training and conditioning before filming began so that her movements seemed light and efficient rather than imposing in terms of acting.
He said the emotional scenes were the ones where the series’ central debate was the deciding factor. Hong expresses those moments in clearly moral terms. “Every time Na Hwa-jin and the inspector say to the victim, ‘We will protect you,’ I wanted them to feel that those words were more than just a conversation. I wanted them to convey the true responsibility of adults and the genuine compassion of one human being for another,” he says. Without that foundation, he says, any action won’t feel justified and will become a spectacle. “This action isn’t just meant to entertain; it’s an expression of standing up for people who have been shattered by what they’ve endured.”
The show marks Hong’s second ongoing involvement with institutions that fail young people, following the 2022 Netflix series “Juvenile Justice,” which examined South Korea’s juvenile court system. He sees a consistency between the two works, but he believes it lies somewhere other than an obvious institutional critique. The deeper concern, he says, lies in communication, or its breakdown. “I believe that the greatest cause of conflict in our society today is our inability to communicate with each other,” he added. As I worked on “juvenile justice,” I came to understand that juvenile crimes are never just a problem for perpetrators, but are always intertwined with families, schools, and society as a whole. “Teach You a Less” continues that idea. The difference is in tone. Where previous series examined the complexities of the whole through a restrained and balanced lens, the new series intentionally aims for catharsis.
The scale of the international response revealed something to Hong about how certain storytelling is transmitted. The show’s conversations about education in South Korea, such as the erosion of respect for teachers, the inadequate institutional response to bullying, and the question of what adults owe children, were picked up and reprocessed by viewers in contexts that Hong had not anticipated. Teachers in other countries are interpreting this series through the lens of their own classrooms. The show’s line, “It takes a village to raise a child,” has spread far beyond its original context. “The more faithfully you portray the concrete realities of Korean society, the more universal the story becomes. The more concrete and authentic the story, the more people can see themselves in it,” Hong says.
From this he drew a sharp conclusion. Diluting the story for a global audience or overemphasizing its Korean identity will not create true resonance across borders. “Authenticity ultimately transcends borders,” he says. This is a position that stands in opposition to a more calculative approach to global content, an urge to whittle away local particularities in favor of universal averages, an impulse that Hong believes was central to the show’s success.
Kim was concerned about this very issue during production. “Since this series is set in the Korean education system, we were worried that viewers around the world would find it difficult to relate to the story or feel distant from it,” he says. What surprised him most about the show’s reception was the fact that so many people didn’t watch it. “With lots of love, I hope this series stays in the hearts and memories of viewers for a long time,” he says.
Hong said that beyond viewership numbers, what he actually wanted was for “Teach You a Lesson” to generate meaningful social conversation, and he was happier than any metric to see that happen. “It was also very interesting and very moving to see teachers and parents from other countries interpret this story through the lens of their own societies and experiences,” he says.
Hong said he would welcome the opportunity to return for a second season. He also continues to think about schools more broadly and the stories within them that have yet to be told. No matter what happens next, the question he says he returns to at the beginning of every project remains the same. “What stories do people most need to hear right now?” he says. “I believe that all stories, no matter the genre, must ultimately be about humans.”
