'Teach You a Lesson' Tops 57.5M Views, Netflix's No. 2 K-Drama Ever

A Netflix original about a rogue agency policing broken classrooms just became the No. 2 most-watched Korean title in Netflix history — seven weeks after release. Here's what the numbers mean.

What the show is

"Teach You a Lesson" (참교육) is a Netflix original series directed by Hong Jong-chan ("Juvenile Justice") and written by Lee Nam-kyu ("Daily Dose of Sunshine"), adapted from the Naver webtoon of the same name. It follows a fictional government agency, the "Teachers' Rights Protection Bureau," created to fight back against students, parents, and teachers who cross the line in Korea's broken classrooms. Kim Mu-yeol stars as agency member Na Hwa-jin, with Lee Sung-min, Jin Ki-joo, and Pyo Ji-hoon in key roles. All 10 episodes dropped at once on June 5, 2026.

The numbers

"Teach You a Lesson" launched with a buzz score of 54,881 points, the highest opening score of any 2026 Netflix Korean original. In its first week it ranked No. 1 among Netflix's non-English TV shows and No. 3 overall, and within seven days it topped FlixPatrol's Netflix TV Shows chart in 45 countries to claim the global No. 1 spot.

The momentum kept building. By week two it had passed 20 million views and 200 million hours viewed while still holding the non-English No. 1 spot, and in the single week of June 15–21 it added another 11.8 million views, extending its streak to three straight weeks at No. 1 with rankings of No. 1 in 19 countries and Top 10 in 85. In Netflix's first-half 2026 report, the show ranked No. 6 overall for the half-year with 48.2 million cumulative views and No. 3 overall for cumulative hours viewed at 514.7 million. By week seven (July 21), cumulative views had climbed to 57.5 million, surpassing both "The Glory" (39.7 million) and "All of Us Are Dead" (55.5 million).

What drove the numbers

On the creative side, director Hong Jong-chan — known for moving between social-issue dramas and genre thrillers — paired with writer Lee Nam-kyu, whose strength is character-driven storytelling. The show turns the real-world collapse of teachers' authority into genre-style catharsis, with a government agency dispensing something close to vigilante justice, and in doing so it absorbed the fandom already built by the "revenge against injustice" lineage of "The Glory" and "All of Us Are Dead." Releasing all 10 episodes at once encouraged binge-watching, and Kim Mu-yeol's transformation into the role helped him top Netflix's TV-OTT combined actor buzz ranking in the first week of June, fueling a wave of clips and short-form spread.

Externally, the early-June release timing ahead of summer vacation and a competition-light release week both worked in its favor. School violence and the state of education were already proven global draws thanks to "The Glory" and "All of Us Are Dead," and reaching No. 1 in 19 countries and the Top 10 in 85 shows the subject's appeal isn't confined to Korean audiences.

Where opinion splits

Commercial success aside, critical reception is mixed. Domestic reviews have argued that the solution the show dramatizes looks less like "genuine, student-centered education" — the literal meaning of its Korean title — and more like violence: forcing an opponent to submit through force, which some critics flagged as a limit of the show's direction. Fans of the original webtoon have also criticized the adaptation: a character who served as an antithesis to the Bureau in the webtoon was dropped from the drama, replaced by an opposition-party leader whose conflict is driven by political self-interest, flattening the story's central tension. The relationship between the lead and teacher Im Han-rim was also reworked from the source material, drawing mixed reactions from webtoon readers over the shift in character arcs. That the viewing numbers never dipped despite this criticism suggests the show's genre polish outweighed concerns about narrative nuance for most viewers.

Records and what they mean

"Teach You a Lesson" now ranks as Netflix's No. 2 Korean title of all time by cumulative views and No. 3 overall by cumulative hours viewed in the first half of 2026 — a career peak for Kim Mu-yeol. It also confirms director Hong Jong-chan's ability to repeat success in socially conscious genre drama after "Juvenile Justice," and proves writer Lee Nam-kyu's commercial instincts extend beyond her earlier work into genre adaptation. For Netflix, it's another data point showing the continued firepower of its non-English series slate.

What's next

Anticipation for a second season is high, but Netflix has said "nothing has been decided" on renewal. The original webtoon still has unadapted storylines and characters, so there's no shortage of material if a season 2 gets greenlit. Should it happen, how well the show addresses the narrative-simplification criticism from season one will likely determine whether the momentum holds. Even without a second season, "Teach You a Lesson" has already secured its place in the lineage of "The Glory" and "All of Us Are Dead" within K-content's global hit landscape.

This is nuloq's own analysis based on the public ratings, charts, reporting, and official sources listed under Sources, written with the help of AI. It is an interpretation of public data for information and criticism only — not a definitive judgment of any show, cast, creator, or broadcaster — and ratings and chart figures reflect the time of writing. We correct the text if errors are found.