Difference between revisions of "Teach You a Lesson"

Latest revision as of 03:05, 8 June 2026

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Drama: Teach You a Lesson (English title) / True Lessons (working title)
Revised romanization: Chamkyoyook
Hangul: 참교육
Director: Hong Jong-Chan
Writer: Chae Yong-Taek (webcomic), Han Ga-Ram (webcomic), Lee Nam-Kyu
Network: Netflix
Episodes:
Release Date: June 5, 2026
Runtime:
Language: Korean
Country: South Korea

Plot Synopsis by AsianWiki Staff ©

School teachers have a hard time to discipline students and they often don’t even have the will to do so. The authority of the teachers in the classroom breaks down and this causes serious social issues. The National Assembly and the Minister of Education passes the Amendment to the Act on the Protection of Teachers' Rights. With the passage of the law, a new government organization, the Educational Rights Protection Bureau, is formed. Na Hwa-Jin (Kim Moo-Yul) belongs to the Educational Rights Protection Bureau. He is sent to a problem school as a supervisor. There, he can educate the students without any restrictions or limitations.

Notes

Based on webcomic "Chamkyoyook” written by Chae Yong-Taek & illustrated by Han Ga-Ram (first published November 1, 2020 via Naver).

Cast



Kim Moo-Yul	Lee Sung-Min	Jin Ki-Joo	Pyo Ji-Hoon
Na Hwa-Jin	Choi Gang-Seok	Im Han-Rim	Bong Geun-Dae

Hwang Gi-Tae's Group



Kim Jong-Soo	Kim Byung-Choon	Baek Ji-Hye	Choi Sol-Hee
Hwang Gi-Tae	Lee Cheol-Myeon	aide	assemblywoman (ep.2-3)

Choi Ga-Yun Case



Ha-Young	Lee Bong-Joon	Jung Myung-Kun
Choi Ga-Yun	Cho Gyu-Cheol	Prison Guard Yoon (ep.4)

Daehan High School Case



Lee Chan-Yong	Jeong Soo-Hyun	Lee Seung-Gyu	Kim Do-Geon	Kang Joon
Kim Gyeong-Min (ep.1)	Park Dae-Seok (ep.1)	Ryu Jun-Hyeong (ep.1)	Kim Gwang-Su (ep.1)	Kim Hak-Jae (ep.1)



Song Young-Kyu	Kim Eun-Seok	Jeon Kwang-Jin	Kwak Kyoung-Hwa	Choi In-Sun
Ryu Gwang-Pil (ep.1)	Principal Kim (ep.1)	teacher (ep.1)	teacher (ep.1)	substitute teacher (ep.1)



Park Wan-Kyu	Lee Ha-Ye	Lim Su-Yeon	Jang So-Yun
Park Dae-Seok's dad (ep.1)	Lee Min-Ji (ep.1)	Kim Na-Rae (ep.1)	Lee Na-Yun (ep.1)

Guun High-Tech High School Case



Jeon Bong-Seok	Yoo Tae-Joo	Ok Jin-Wook	Lee Tae-Hwan	Kim Chan-Hyung
Kim Hyeong-Ju (ep.2,4)	Park Seong-Hwan	Cho In-Beom	Jang Kwon-Hyuk (ep.2)	Du-Mok (ep.2)



Sung No-Jin	Yoon Woon-Yong	Byun Yoon-Jeong	Lee Gwang-Hee	Ham Jae-Hyun
principal (ep.2)	teacher (ep.2)	Kim Hyeong-Ju's mom (ep.2)	Lee Gwang-Hee (ep.2)	Ham Jae-Hyun (ep.2)



Park Woo-Young	Lee Dong-Gi
electrical student (ep.2)	electrical student (ep.2)

Soyeon Girls' High School Case



Lee Sang-Hee	Park Seo-Yoon	Kwon Hyuk	Kim Se-Yeon	Jeong Seo-Yeon
Jung Seon-Yeong (ep.3,10)	Han Ye-Ri	Ko Yeong-Su (ep.3)	Jung So-Yeong (ep.3)	Ko Yeong-Su's wife (ep.3)



Park Yong	Lee Si-Young	Seo Dong-Hyun	Park Bo-Bae
principal (ep.3)	Jung Seon-Yeong's friend (ep.3)	Oh Jung-Hwan (ep.3)	Park Hyeon-Ju (ep.3)

Chukmyeong Foreign Language High School Case



Choi Duk-Moon	Bae Jun-Hyung	Kim Sun-Hwa	Sim Su-Bin	Lee Hannuri
Cheon Sang-Yeol (ep.4)	Park Hyeon-Ung (ep.4)	Jung Su-Jeong's mom (ep.4)	Jung Su-Jeong (ep.4)	teacher (ep.4)



Lee Dong-Ho	Gu Bon-Jin	Kim Tae-Yoo	Park Seung-Hyun	Ok Il-Jae
institute teacher (ep.4)	Park Hyeon-Ung's dad (ep.4)	institute staff (ep.4)	detective (ep.4)	prosecutors' office investigator (ep.4)

Han Ki-Jang

lawyer (ep.4)

Hyeongjung Elementary School Case



Song Si-An	Park Ji-Yeon	Choi Ja-Yoon	Jang Hee-Jung	Kang Ji-Eun
Choi Ji-Seon (ep.5)	Lee Ji-Young (ep.5)	Kim U-Jin (ep.5)	Lee Young-Mi (ep.5)	Principal Kim Ji-Eun (ep.5)



Kwon Dong-Ho	Yoon Hyun-Gil	Lee Ji-Hae	Lee Su-Ho	Choi E-Jun
Kim U-Jin's dad (ep.5)	Choi Ji-Seon's mom (ep.5)	Kang Seo-Jun's mom (ep.5)	Kang Seo-Jun (ep.5)	student (ep.5)



Kim Eun-Ho	Park Si-Hyun	Kim Ye-Rin	Han So-Hyun	Kim Sung-Yong
student (ep.5)	student (ep.5)	Yeon-Seo (ep.5)	bank teller (ep.5)	bank manager (ep.5)



Lee Eun-Joo	Choi Young-Min	Park Gang-To	Han Sun-Ae	Lee Do-Eun
prosecutor (ep.5)	Ministry of Education staff (ep.5)	Ministry of Education staff (ep.5)	student's mom (ep.5)	student's mom (ep.5)

Kim Soo-Young

student's mom (ep.5)

Hyeonjin Middle School Case



Jang Yo-Hoon	Leem Hyun-Mook	Yoon Tae-Sik	Choi Hyun-Joon	Kim Chae-Eun
Min Ji-Ung (ep.6-7)	Yun Min-Su (ep.6-7)	Lee Du-Hyeon (ep.6-7)	Choi U-Seong (ep.6-7)	Oh Yun-Jin (ep.6)



Kim Kyun-Ha	Choi Jae-Sup	Do Geon-Wu	Bae Sung-Il	Jo Yu-Jin
Kim Su-Gyeom (ep.6-7)	Kang Jun-Man	Na Jung-Hwan (ep.6-7)	prison warden (ep.6)	Min Ji-Ung's mom (ep.6)



Yeo Min-Goo	Jang Ji-Yong	Yoo In-Hye	Eom Ji-Man	Ahn Chan-Woong
Yun Min-Su's dad (ep.6)	Lee Du-Hyeon's dad (ep.6)	Choi U-Seong's mom (ep.6)	detective (ep.6)	detective (ep.6)



Lee Hyung-Joo	Kim Yu-Bin
Teacher Lee (ep.6)	student (ep.6)

Nakwon High School Case



Bae Jae-Young	Jo Eun-Sol	Jo Jun-Ho	Jo Hyun-Woo	Lee Seo-Won
Lee Jae-Yun (ep.7)	Shin Ji-Su (ep.7)	Ji Seong-Bin (ep.7)	Lee Jae-Yun's dad (ep.7)	Lee Jae-Yun's mom (ep.7)



Chun Myung-Woo	Choi Jun-Kyu	Seo Hye-Min	Jeon Kyu-Won
gang member (ep.7)	gang member (ep.7)	teacher (ep.7)	debt student (ep.7)

Seungyeon High School Case



Seo Young-Hee	Kim Tae-Young	Jang Eun-A	Cho Yeon-Jin	Lee Suk-Joon
Jung Hyeon-Min's mom (ep.8)	Jung Hyeon-Min (ep.8)	Cho Da-Hui's mom (ep.8)	Yeong-Jun's mom (ep.8)	Jung Hyeon-Min's dad (ep.8)



Lee Seo-Han	Jo Jae-Young	Yoon Young-Min	Kim Eun-Young
Seo Beom-Su	detective (ep.8)	tutor advisor (ep.8)	school nurse (ep.8)

Jinwon High School Case



Lee Woo-Je	Kim Jae-Seon	Shin Dong-Jun	Lee Seung-Noh	Lee Jung-Hwa
Jang Seong-Gu (ep.9-10)	Lee Chi-Ho (ep.9-10)	Lee Jong-Su (ep.9)	Jung Hyun-Tae (ep.9)	Ms. Min (ep.9-10)



Jeon Young	Park Ji-Won	Kim Da-Hwin	Eom Ju-Yeon	Jung Jong-Yul
Jang Seong-Gu's mom (ep.9)	Lee Chi-Ho's mom (ep.9)	Attorney Yoon Tae-Gyeong (ep.9)	Lee Ji-Hyo (ep.9)	committee chairman (ep.9)



Moon Dong-Ho	Park Ryang-Woo	Cho Tae-Min	Ha Na-Ri	Dok Ko-Kwang
Seo Jin-Hyeok (ep.9-10)	scam victim (ep.9)	motorcycle ad guy (ep.9)	teacher (ep.10)	teacher (ep.10)



Lee Ga-Yeon	Baek Na-Gyeong
Ham Yu-Ri (ep.10)	Soyeon H.S. student (ep.10)

Others



Park Kwan-Woo	Son Da-Yeon	Jeon Seung-Hoon	Park Jae-Hwi
Im Han-Rim's classmate (ep.4)	Im Han-Rim's classmate (ep.4)	Seo Tae-Hoon (ep.10)	basketball player (ep.10)

Additional Cast Members:

Lee Ho-Cheol - reporter (ep.1-2)
Jin Si-Won - reporter
Kim Dae-Geun - MZ gang member (ep.2)
Jeon Young-Woo - MZ gang member (ep.2)
Lee So-Geum - detective (ep.4)
Lee Seung-Jin - teacher (ep.4)
Seo Kwang-Jae - hearing chairperson (ep.4)
Lee Jae-Woong - ERPB security guard (ep.7)
Kim Kwan-Jang - Jinwon High School parent (ep.9)
Kim Min-Suk - parole examiner (ep.9)

Trailers

Comments

Lina Jun 08 2026 12:35 pm What a great surprise this series turned out to be! I started watching it without many expectations and ended up completely hooked. The storyline was engaging from beginning to end, with the perfect mix of action, suspense, humor, and emotion. What I appreciated most was that it wasn't just entertaining—it also carried important messages and lessons that made the story feel meaningful. The characters were well developed, the performances were fantastic, and the dialogue felt natural and refreshing. There were so many moments that were oddly satisfying to watch, and every episode left me wanting more. It's rare to find a show that keeps you invested while also making you laugh and reflect at the same time. Definitely one of my favorite Netflix watches lately. Now I'm crossing my fingers for a Season 2 because this is a story I'd love to continue following.

Eri Jun 08 2026 10:42 am I hope there's a second season! There's so much to explore in the plot (I haven't read the manhwa), and my Geundae-Hanrim ship is just starting to sail. T_T

Lyd82 Jun 08 2026 10:40 am "Teach You a Lesson" is a highly engaging K-drama with a fantastic storyline and great writing. But, the actors playing the middle and high school students look visibly mature, appearing more like they are in their mid-twenties than actual teenagers.

Aeryn Jun 08 2026 7:49 am I've never gave any comments here but this drama is so good that I couldnt move on! Kim Moo-Yul really nailed this character! Probably will be my best kdrama of the year!!!

Kdrama_nerd Jun 08 2026 7:23 am Jo Hyun Woo (EP 7) is so immersed in his character. I actually felt so much and cried for a father character, for the first time. This also made me look into more of his other work. BIG FAN

Lucy Jun 08 2026 7:06 am Wow!

Another great drama! It does feel like *TaxiDriver ????

G Jun 07 2026 7:58 pm U Jin’s mother is the scourge of the earth. Toxic parents like her should have their mental health evaluated before even being allowed to conceive. Mad woman.

Bimini Jun 07 2026 2:06 pm Impressive. Tackles a difficult subject matter from many perspectives. Well written and constructed script and story line. Presents one possible alternative way in which to handle each of these cases. Believable acting, with little build up to each scenario.

K-li Jun 07 2026 1:26 pm Does anybody knows who plays the soundtrack "Chihuahua" in the show?

shanks Jun 07 2026 8:46 am as a standalone it's decent but knowing the webtoon.. it's such a shame because I really did enjoy the webtoon in the beginning :(

Anna Jun 07 2026 7:47 am This drama is so amazing kinda giving Study group's vibe. I love it

Maria Jun 07 2026 7:31 am I love the series so much. I feel like I'm watching Taxi Driver meets Juvenile Justice. ?❤️

Riri Jun 07 2026 7:15 am This has the feel and vibe of Trauma Code where there is one main character who defies the norm and is supported by a slew of his or her loyalists. Somebody mentioned about John Cena. Now , I cannot unsee it.

Qweerty Jun 07 2026 4:01 am @Dimitra was right. @kcecece is the actress who plays Oh Yun-Jin

Dimitra Jun 07 2026 2:15 am I noticed what appears to be an error in the cast listing for “Teach you a lesson” on your website. One of the actresses listed may be incorrect. I believe the actress who plays Oh Yun-Jin is not correctly identified. Unfortunately, I do not know her full name, but her Instagram account is @kcecece. I thought I would bring this to your attention in case you would like to verify and update the information.

Virtusa Jun 07 2026 12:51 am Love the series!!! Hope it’s sequel to Brave Citizen movie and Hope Shin Hye-Sun would appear here. ???

Saranghae Jun 06 2026 4:31 pm I want to retract what I wrote below. I'm on episode 4 and only now I can say that the whole story makes sense. Great series.

someone Jun 06 2026 4:12 pm Kim moo yul is so atractive here?????. Btw this is my first time kim moo yul kdrama ?

Mr Jun 06 2026 3:04 pm This was surprisingly the best kdrama. I love this kind of drama. This is the reason I watch kdrama. There is message, moral and fighting against corruption and fighting for the victims.

dludiodioo Jun 06 2026 12:28 pm OH.MY.GOD The MC is literally look like the exact copy of the Manhwa. I'm so down for this. I hope it has 100 more episodes

AC Jun 06 2026 11:44 am The story is incredibly relatable and reflects today's reality remarkably well.

ac Jun 06 2026 11:42 am The story is incredibly relatable and reflects today's reality remarkably well.

Best Kdrama of 2026 Jun 06 2026 11:04 am This is one of the best Kdrama I've watched this year 2026. The topic was so heavy and heartbreaking and I always cried at the end of each episodes but still I enjoyed watching this series, it was perfectly blended with funny, action, great acting, heavy scenes and heartfelt scenes with this Kdrama. It deserves all the love, recognitions and awards soon in. Kdrama acting in Korea.

squi Jun 06 2026 7:44 am @Saranghae tbh, i don't even think this drama is exaggerated. Teachers are cowards. And this does happen in real life. There are alot of bullying cases in korea, especially with hierarchy involved, and even worse than this. Maybe you should do more research.

Saranghae Jun 06 2026 7:00 am What I think is that this drama is exaggerated and unreal. Where is this happening? Moreover, where are all the teachers????? Doesn't anyone see that in the classrooms and in the hallways of the school there are children being abused????? Come on, give me a break ?‍♀️?‍♀️?‍♀️

Lalala Jun 06 2026 6:12 am Love that Kim Nam-Gil rejected this drama and got Kim Muyeol as replacement. I love both actor but this character has similar image with Kim Hae-il. Meanwhile Kim Muyeol fits the role perfectly. Imagine Kim Hae-il and Na Hwa-jin meet, I don't think evils would dare messing up with them

augmentedmelon Jun 06 2026 4:59 am now that we got study group and true education, we need a to not die drama (cast me as dajun please), also to not die the webtoon was shown in the gambling episode

maria.georgianne Jun 06 2026 1:32 am is it just me? i find hwa jin and han rim's chemistry sooooo??? please i'm hoping this will end with them

Jamse Jun 05 2026 10:21 pm Is it just me, or does Na Hwa Jin resemble actor and WWE star Jon Cena?

RM Jun 05 2026 6:57 pm 10/10 The whole ERPB team was aura farming especially na Hwa jin and Choi gang seok. Han rim and geun Dae were great too Spoiler

My only disappointment is that Hwa jin should've beaten up that gyu cheol even more in the climax than just the whole circle kind of emotional moment with forgiveness again. I would've crashed out if minister Choi hadn't come to gyu cheol and list out his crimes and saying he'll never step foot into the school again

gha Jun 05 2026 4:23 pm I really thought Kim Nam Gil was the main lead but when I watched Kim Moo Yul, she was super good. It's really like that, whoever is the second choice, the drama will really be a hit because she's good and the lead is great❤

F Jun 05 2026 12:23 pm Is Im Han-rim the daughter of the owner of Hanlim Gym? I read her story in manhwa.. she was the one who coaches the uncle of Yoon Ga-min to be a fighter. Does it mean that she's older than Ga-min's uncle? And Get Schooled/True Education comes first to Study Group? Please someone summarized the Blue String Universe? ?

Hamidah Ashari Jun 05 2026 11:24 am Simply awesome. Love it!!

M3rry Jun 05 2026 10:38 am Gooooood from the begining But i dont like jin ki joo For this role suit for shin hye sun ??

Riri Jun 05 2026 10:26 am I miss Song Young-gyu . :(

aleput Jun 05 2026 8:48 am uhhhhh i know i will finish all the episodes in a day! so good since the beginning!!!!

Lee Jun 05 2026 8:40 am Awesome start ftom ep.1! Really loving this genre. Can't wait for season 2 already!

Kdrama lover May 23 2026 3:19 pm Looks like a tamer Battle Royale.

Teach May 13 2026 11:40 pm Looks good...with Fiery Priest vibes...heheheh

maysilee May 08 2026 8:29 am seated for kim moo yul! his previous projects always amazed me <3

Marvel Apr 15 2026 9:33 am Heard so many controversies surrounding the plot from the webtoon, but it makes me even more excited to watch it, especially with these casts. Look forward to it.

neniinduhd Aug 14 2025 10:23 pm waahhh, my fav webtoon. can't wait

asphen Jun 19 2025 4:52 am seated for jin kijoo and lee sungmin, i already know this drama is going to be amazing!

newtopia Mar 24 2025 9:20 pm seated for jin kijoo!! Can't wait to see her on screen!

@@ Line 149: / Line 149: @@
 |11name=Park Woo-Young (2001){{!}}Park Woo-Young
 |11charactername=electrical student (ep.2)
-|12picture=File:Teach You A Lesson-Lee Dong-Gi.jpg
+|12picture=File:Teach You A Lesson-Lee Dong-Gi1.jpg
 |12name=Lee Dong-Gi (1996){{!}}Lee Dong-Gi
 |12charactername=electrical student (ep.2)
@@ Line 479: / Line 479: @@
 * [[Lee Ho-Cheol (1987)|Lee Ho-Cheol]] - reporter (ep.1-2)
 * [[Jin Si-Won (actor)|Jin Si-Won]] - reporter
+* [[Kim Dae-Geun (1990)|Kim Dae-Geun]] - MZ gang member (ep.2)
+* [[Jeon Young-Woon (1995)|Jeon Young-Woo]] - MZ gang member (ep.2)
 * [[Lee So-Geum (1989)|Lee So-Geum]] - detective (ep.4)
 * [[Lee Seung-Jin (1991)|Lee Seung-Jin]] - teacher (ep.4)

Difference between revisions of "Teach You a Lesson"

Latest revision as of 03:05, 8 June 2026

Contents

User Rating

Profile

Plot Synopsis by AsianWiki Staff ©

Notes

Cast

Hwang Gi-Tae's Group

Choi Ga-Yun Case

Daehan High School Case

Guun High-Tech High School Case

Soyeon Girls' High School Case

Chukmyeong Foreign Language High School Case

Hyeongjung Elementary School Case

Hyeonjin Middle School Case

Nakwon High School Case

Seungyeon High School Case

Jinwon High School Case

Others

Trailers

Comments

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Comments