The new Korean action drama Teach You a Lesson dropped all 10 episodes on Netflix on June 5, 2026, and viewers have already finished the season. The show follows a special government team called the Educational Rights Protection Bureau (ERPB) that steps into troubled schools to fix problems when teachers and principals cannot. The big question on everyone’s mind after watching the finale is whether Na Hwa-jin, played by Kim Moo-yul, manages to bring justice for his late fiancée and stop the main villain Gyu-cheol for good.
The final episode wraps up the drug distribution story that ran through the entire season while also showing how the ERPB handles its biggest challenge yet. Here is a complete breakdown of what happened in the ending and whether justice actually wins.
The ERPB’s Secret Plan to Catch Gyu-cheol
The finale reveals that Hwa-jin allowed the ERPB to get shut down on purpose. He punched Gyu-cheol earlier, knowing the public would react badly and force the bureau to close temporarily. This move gave Gyu-cheol false confidence to expand his drug business inside Jinwon High School. Hwa-jin wanted Gyu-cheol to show his full operation so he could catch everyone involved at once.
While the public thought the ERPB was finished, Hwa-jin launched a secret operation. He contacted teachers from schools the bureau had helped in the past. Ms. Choi and many other teachers agreed to assist. They started collecting drugs from students and handing them over to the ERPB privately. At the same time, Han-rim and Geun-de went undercover as students to gather evidence from the inside.
Geun-de also used other students to place large drug orders. This strategy drained Gyu-cheol’s supply and stopped many students from consuming the drugs. The plan worked exactly as Hwa-jin wanted.
The Truth Behind Ga-yun’s Murder Gets Fully Revealed
The finale includes a flashback showing exactly what happened to Ga-yun, Hwa-jin’s fiancée and Minister Choi Gang-seok’s daughter. Ga-yun was a teacher who always stood up for her students. She pushed Gyu-cheol to attend school and leave his gangster life behind. Instead of changing, Gyu-cheol decided to use other students to sell drugs. He thought this would make Ga-yun stop pressuring him.
Ga-yun initially felt impressed by his effort to attend classes. But she later discovered the drugs in his bag and threw them away. Gyu-cheol became enraged. He stabbed and killed the one teacher who actually wanted to help him rebuild his life. This tragedy became the reason Minister Choi and Hwa-jin created the ERPB in the first place.
The Final Confrontation Between Hwa-jin and Gyu-cheol
The last episode shows Hwa-jin chasing Gyu-cheol after exposing his drug network. During the operation, Han-rim accidentally inhaled some drugs and lost control. She started attacking Gyu-cheol’s associates while under the influence. Geun-de stayed behind to help her recover while Hwa-jin continued the pursuit alone.
When Gyu-cheol saw Hwa-jin getting closer, he threatened to have one of his friends kill Seong-gu, a student who tried to contact the ERPB earlier. Gyu-cheol tried to stab Hwa-jin, but Hwa-jin fought back. One of Gyu-cheol’s associates attacked Seong-gu anyway. Hwa-jin jumped in front of the student and allowed himself to get stabbed while protecting him. Han-rim finally regained her senses at that moment and stopped the attacker.
Hwa-jin then beat Gyu-cheol badly. Gyu-cheol tried to provoke him by bringing up Ga-yun’s final words. Instead of giving in to his anger and killing Gyu-cheol, Hwa-jin told him to try rebuilding his life someday. He believed this was what Ga-yun would have wanted. Minister Choi initially stayed calm and promised Gyu-cheol would face punishment. But when he saw how badly Hwa-jin was injured, he lost control and tried to attack Gyu-cheol himself.
“Hwa-jin tells Gyu-cheol to try to rebuild his life someday, believing that this is what Ga-yun would have wanted.” – Episode 10 recap
Minister Choi’s Final Address to the Nation
After Gyu-cheol got arrested again, Minister Choi Gang-seok addressed the people of South Korea. He spoke about the sacrifices made by teachers and students to protect the education system. He promised that the ERPB would continue protecting victims, whether they were teachers, parents, or students. The minister made it clear that the bureau was not going anywhere despite all the efforts to shut it down.
After the address, Hwa-jin and Minister Choi took Han-rim and Geun-de to Ga-yun’s grave to pay their respects. The two men noticed Han-rim and Geun-de awkwardly trying to ignore their feelings for each other. This small moment gave viewers a break from the intense action.
Related: Hooked on Teach You a Lesson? Here Are 6 More K-Dramas That Bring the Same School Justice Energy
The Season’s Final Scene Sets Up More Stories
The last scene of Teach You a Lesson Season 1 jumps to another school called Kangju High School. Geun-de arrives dressed like Hwa-jin and tries to teach a bully a lesson. But he finds himself intimidated by the student. Han-rim shows up to help, but both of them struggle against the bully. Hwa-jin arrives just in time to help them out.
Meanwhile, Gi-tae, who worked with Gyu-cheol throughout the season, got arrested. He vowed to take Minister Choi down once he got released from prison. The season ended with Minister Choi punching Gi-tae to shut him up.
A new case file also landed on Hwa-jin’s desk at the end. This suggested the ERPB’s work was far from finished. The show made it clear that bullying and corruption in schools connect to bigger problems involving politicians, wealthy parents, and school management systems.
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Streaming Details for Global Viewers
All 10 episodes of Teach You a Lesson are now available on Netflix worldwide. Viewers in the United States, United Kingdom, Canada, Australia, and India can stream the entire season. The show carries a TV-MA rating for mature content. It stars Kim Moo-yul as Na Hwa-jin, Lee Sung-min as Minister Choi Gang-seok, Jin Ki-joo as Im Han-rim, and Pyo Ji-hoon (also known as P.O. from Block B) as Bong Geun-dae. The series was directed by Hong Jong-chan and adapted from the popular webtoon Get Schooled.
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