The first thing the camera gives you is the light. A Korean school corridor under flat fluorescent wash, the colour drained out of it until the linoleum, the steel lockers and the students slumped against them all read the same institutional grey. Then a man walks into that grey who does not hurry. The frame holds on him the way it would hold on a weapon set down on a table, and the room seems to rearrange itself around his stillness before he has done anything at all.

The man is Na Hwa-jin, and he works for a body that exists only inside this story. The Educational Rights Protection Agency is a ministry invention, a unit the government has licensed to do the single thing every real institution in that building is forbidden to do: put its hands on the problem. He is dispatched to schools where delinquent students, frightened teachers and compromised principals have hollowed a classroom from the inside, and he restores order with exactly the kind of force the ordinary system long ago surrendered the right to use. The surface is a revenge fantasy, clean and satisfying. Underneath it is a story about a law that wrote teachers out of their own authority, and the fist someone dreamed up to write it back in.

What makes the premise more than a slogan is the way the series is built to repeat itself. Each deployment resets to a new ruined room, a new principal with something to hide, a new hierarchy of students who have learned that nothing the adults can do will reach them. That school-of-the-week shape is not lazy structure; it is the argument. By insisting that the next building tells the same story as the last, the show refuses the comfort of the single bad apple. The rot is everywhere, it says, which is precisely the claim the teachers’ movement was making about the system rather than the individual.

That argument lives or dies on the direction, and the direction is the most interesting friction in the show. Hong Jong-chan made Juvenile Justice, a series whose entire grammar was restraint, a camera that refused the easy spectacle of a child in handcuffs. Here he inherits a property built for the opposite instinct. Get Schooled, the Naver webtoon underneath this, earned its following on the clean pleasure of impact, the panel where the bully finally goes down and stays down. The tension is what a director of stillness does with a premise that wants noise. He shoots the schools like crime scenes, patient and over-lit, every surface readable. He renders the agency itself clean, modern, almost corporate, a colour world away from the decaying buildings its agents are sent into. Even the violence is composed rather than thrown away; the trailer favours the held wide shot over the shaky close-up, so a corridor brawl reads less like chaos than like a verdict being carried out. The composition keeps drawing a line the script keeps smudging, between the people who broke the room and the people sent in to break them back.

It helps to know where this sits on the shelf. The series belongs to a now-recognisable lineage: the Korean webtoon redrawn as Netflix genre, with institutional failure as its recurring subject. It shares blood with The Glory, which treated school violence as a wound that organises an entire life, and with Vigilante, which asked an audience to enjoy a man delivering the punishments the courts would not. What separates Teach You a Lesson from its own director’s earlier work is the surrender of restraint as a moral position. Juvenile Justice watched the system fail and sat with the discomfort. This show watches the system fail and hands you someone who fixes it with his hands.

The reason the fantasy carries weight is that the grievance under it is real and unfinished. South Korea has spent years inside a public reckoning over gyogwon, the authority of its teachers, after a young educator’s death at a Seoul elementary school sent tens of thousands of teachers into the streets in black. They were protesting a framework that had armoured students and parents with rights and recourse while leaving the adult at the front of the room almost entirely exposed, vulnerable to a parent’s complaint that could end a career. Get Schooled was already the internet’s vigilante answer to that imbalance, drawn before the marches gave the feeling a name. The series arrives with the policy fight still open, which is why it does not read as invention. It is dramatising an anxiety the country has not put down.

And it knows what it is doing to you while you watch. The contract is catharsis: the untouchable kids are finally answered for, the smug principal finally sweats, and the staging delivers each beat with a craftsman’s timing. But the same shot that satisfies also implicates. You are cheering classroom violence, sold to you as the only language left, aimed at people the script has carefully given you permission to dislike. The show declines to step in and judge the pleasure for you. It trusts you to feel the catch in your own throat, and then it cuts to the next school before you can decide what the catch means.

Step back far enough and the most revealing thing is the transaction around the show, not only inside it. Netflix has taken a domestic-policy grievance specific to Korean staff rooms and bet that it travels as pure genre, legible to a viewer in São Paulo or Warsaw who has never heard of a student-rights ordinance. The full-season drop, all ten episodes at once, matches the payload: this is a story designed to be binged for its wins, not parcelled out weekly for its questions. The mature-audiences rating is not incidental either. It is the licence that lets the fist land hard enough to be the thing people came for. There is a quiet irony in that arithmetic: a story about adults stripped of the power to discipline becomes, in the platform’s hands, a product whose selling point is how freely it disciplines. The grievance gets to keep its righteousness and shed its restraint at the same time.

Which leaves the question the series keeps its hands too full to answer. If the authority of a classroom was dismantled by a system that mistook force for safety, can it honestly be restored by a better-aimed version of the same force? The agency wins every room it enters, and the camera lets you enjoy every win. Yet authority taken back by the fist looks, from a half-step to the side, exactly like the thing the teachers were marching against, only this time pointed at the right targets. The show never closes that gap. It lands the punch and moves on, confident the look of the thing has already told you whose side you are on.

Teach You a Lesson runs ten episodes, all of them arriving together on Netflix on 5 June. Kim Mu-yeol plays the agent at the centre of the agency; Lee Sung-min is the education minister who built the unit around him; Jin Ki-joo is a former special-forces supervisor, and Pyo Ji-hoon, the rapper P.O, the youngest officer in the room. Hong Jong-chan directs from scripts by Lee Nam-kyu, Kim Da-hee and Moon Jong-ho, adapting the webtoon by Chae Yong-taek and Han Ga-ram. Whether the season earns the grievance it borrows is a question only the episodes can settle. The look of it, corridor by grey corridor, already knows exactly what it wants you to want.