Teach You a Lesson

Kim Moo-yul

Na Hwa-jin· 10 ep

Lee Sung-min

Choi Kang-seok· 10 ep

Jin Ki-joo

Im Han-rim· 10 ep

P.O

Bong Geun-dae· 10 ep

Ahn Ha-young

Choi Ga-yun· 6 ep

Kim Jong-soo

Hwang Gi-tae· 5 ep

Lee Bong-joon

Cho Gyu-cheol· 5 ep

Lee Yeo-jin

Anchor· 4 ep

Kim Beong-choun

Lee Cheol-myeon· 3 ep

Baek Ji-hye

Gi-tae's Assistant· 3 ep

Choi Jae-sup

Prison Officer Kang· 3 ep

Jin Si-won

Reporter 3· 3 ep

Kim Eun-hee

Reporter 4· 3 ep

Jeon Bong-seok

Kim Hyeong-ju· 2 ep

Ok Jin-uk

Cho In-beom· 2 ep

Yoo Tae-joo

Park Seong-hwan· 2 ep

Lee Sang-hee

Jung Seong-yeong· 2 ep

Park Seo-yoon

Han Ye-ri· 2 ep

Jang Yo-hoon

Min Ji-ung· 2 ep

Leem Hyun-mook

Yun Min-su· 2 ep

Yoon Tae-sik

Lee Du-hyeon· 2 ep

Choi Hyun-joon

Choi U-seong· 2 ep

Kim Kyun-ha

Kim Su-gyeom· 2 ep

Do Geon-wu

Na Jung-hwan· 2 ep

Lee Woo-je

Jang Seong-gu· 2 ep

Kim Jae-seon

Lee Chi-ho· 2 ep

Lee Seung-noh

Jung Hyun-tae· 2 ep

Lee Jung-hwa

Ms. Min· 2 ep

Moon Dong-ho

Seo Jin-hyeok· 2 ep

Lee Ho-cheol

Reporter 1· 2 ep

Lee Chan-yong

Kim Gyeong-min (uncredited) (archive footage)· 2 ep

Lee Seung-gyu

Ryu Jun-hyeong (uncredited) (archive footage)· 2 ep

Kim Do-gun

Kim Gwang-su· 2 ep

Kang Joon

Kim Hak-jae· 2 ep

Song Seon-hyo

Reporter 2· 2 ep

Choi Sol-hee

Assemblywoman· 2 ep

Jeong Myung-gun

Prison Guard 1· 2 ep

Jeong Soo-hyun

Park Dae-seok· 1 ep

Lee Tae-hwan

Jang Kwon-hyuk· 1 ep

Seong No-jin

Principal· 1 ep

Byun Yun-jeong

Hyeong-ju's mother· 1 ep

Kim Chan-hyung

Boss· 1 ep

Kim Se-yeon

Jung So-yeong· 1 ep

Kwon Hyuk

Ko Yeong-su· 1 ep

Lee Si-young

Ms. Jung's Friend· 1 ep

Jeong Seo-yeon

Ko Yeong-su's Wife· 1 ep

Park Yong

Principal· 1 ep

Seo Dong-hyeon

Male Teacher 1· 1 ep

Park Bo-bae

Female Teacher 1· 1 ep

Yoon Woon-yong

Teacher· 1 ep

Choi Deok-moon

Cheon Sang-yeol· 1 ep

Bae Jun-hyung

Park Hyeon-ung· 1 ep

Sim Su-bin

Jung Su-jeong· 1 ep

Kim Sun-hoa

Su-jeong's Mother· 1 ep

Song Si-an

Choi Ji-seon· 1 ep

Yoon Hyun-gil

Ji-seon's Mother· 1 ep

Jang Hee-jung

Lee Young-mi· 1 ep

Choi Ja-woon

Kim U-jin· 1 ep

Park Ji-yeon

U-jin's Mother· 1 ep

Kim Ye-rin

Schoolgirl 1· 1 ep

Kwon Dong-ho

U-jin's Father· 1 ep

Kang Ji-eun

Female Principal· 1 ep

Bae Jae-young

Lee Jae-yun· 1 ep

Jo Eun-sol

Shin Ji-su· 1 ep

Jo Jun-ho

Ji Seong-bin· 1 ep

Kim Tae-young

Jung Hyeon-min· 1 ep

Seo Young-hee

Hyeon-min's mother· 1 ep

Lee Seok-jun

Hyeon-min's father· 1 ep

Yoon Young-min

Consultant· 1 ep

Cho Yeon-jin

Yeon-jun's mother· 1 ep

Chang Eun-ah

Da-hui's mother· 1 ep

Kim Da-huin

Yoon Tae-gyeong· 1 ep

Lee Ga-yeon

Ham Yu-ri· 1 ep

Jeon Seung-hoon

Seo Tae-hoon· 1 ep

So Yi-han

Chukmyeong Foreign Language School Student 1· 1 ep

Song Young-gyu

Ryu Gwang-pil· 1 ep

Kim Eun-seok

Principal Kim· 1 ep

Lee Ha-ye

2-5 Student 7· 1 ep

Jang So-yun

2-5 Student 12· 1 ep

Jeon Kwang-jin

Homeroom Teacher· 1 ep

Kwak Kyoung-hwa

Female Teacher 1· 1 ep

Choi In-sun

Substitute Teacher· 1 ep

Park Wan-kyu

Dae-seok's father· 1 ep

Lee Gwang-hee

Automobile Department 1· 1 ep

Bahk Woo-young

Electrical Department 2· 1 ep

Lee Dong-gi

Electrical Department 5· 1 ep

Gu Bon-jin

Park Hyeon-ung's Father· 1 ep

Kim Tae-yoo

Institute Staff· 1 ep

Ok Il-jae

Prosecution Official· 1 ep

Han Ki-jang

Lawyer· 1 ep

Lee Ji-hae

Seo-jun's Mother· 1 ep

Choi E-jun

Schoolboy 1· 1 ep

Kim Eun-ho

Schoolboy 3· 1 ep

Park Si-hyun

Schoolboy 4· 1 ep

Kim Seong-yong

Bank Branch Manager· 1 ep

Han So-hyun

Bank Teller· 1 ep

Lee Eun-joo

Prosecutor· 1 ep

Choi Young-min

Ministry of Education Staff 1· 1 ep

Park Gang-to

Ministry of Education Staff 2· 1 ep

Han Sun-ae

Student's Parent 3· 1 ep

Lee Do-eun

Student's Parent 2· 1 ep

Kim Soo-yeong

Student's Parent 1· 1 ep

Bae Seong-il

Prison Warden· 1 ep

Cho Yu-jin

Ji-ung's Mother· 1 ep

Yeo Min-goo

Min-su's Father· 1 ep

Jang Ji-yong

Du-hyeon's Father· 1 ep

Yoo In-hye

U-seong's Mother· 1 ep

Eom Ji-man

Head of the Women and Youth Division· 1 ep

Ahn Chan-woong

Detective of the Women and Youth Division· 1 ep

Lee Hyung-joo

Homeroom Teacher· 1 ep

Kim Yu-bin

Female Student from Hyeonjin Middle School 1· 1 ep

Jo Hyun-wu

Jae-yun's father· 1 ep

Lee Seo-won

Jae-yun's mother· 1 ep

Chun Myung-woo

Gang member· 1 ep

Choi Jun-gyu

Gang member· 1 ep

Jeon Kyu-won

Student· 1 ep

Seo Hye-min

Teacher· 1 ep

Lee Seo-han

Seo Beom-su· 1 ep

Jo Jae-young

Detective· 1 ep

Kim Eun-young

School nurse· 1 ep

Shin Dong-jun

Lee Jong-su· 1 ep

Jeon Yeong

Seong-gu's mother· 1 ep

Park Ji-won

Chi-ho's mother· 1 ep

Eom Ju-yeon

Lee Ji-hyo· 1 ep

Jeong Jong-yeol

Committee chairman· 1 ep

Park Ryang-woo

Scam victim· 1 ep

Cho Tae-min

Motorcycle ad guy· 1 ep

Baek Na-gyeong

Student· 1 ep

Park Jae-hwi

Basketball player· 1 ep

Son Da-yeon

Han-rim Past Female Student 1· 1 ep

Park Kwan-woo

Han-rim Past Male Student 1· 1 ep

Kim Dae-geun

MZ Gangster 5· 1 ep

Jeon Young-woon

MZ Gangster 12· 1 ep

Lee So-geum

Detective 1· 1 ep

Park Seung-hyun

Detective 2· 1 ep

Lee Seung-jin

Teacher 1· 1 ep

Han Nu-ri

Female Teacher· 1 ep

Seo Gwang-jae

Chairperson· 1 ep

Lee Jae-woong

ERPB security guard· 1 ep

Kim Kwan-jang

Student's parent· 1 ep

Kim Min-seok

Parole examiner· 1 ep

Ha Na-ri

Teacher· 1 ep

Dok Ko-kwang

Teacher· 1 ep

Seo Ji-ho

Student· 1 ep

Jeong Ji-soon

Male Student 1· 1 ep

Yoo Geun-sang

Male Student 2· 1 ep

Kim Sung-jae

2-5 Conforming Student· 1 ep

Shin A-ran

2-5 Conforming Student· 1 ep

Lim Su-yeon

2-5 Conforming Student· 1 ep

Shin Dae-geun

2-5 Bystander Student· 1 ep

Kim Ye-eun

2-5 Bystander Student· 1 ep

Bang Min-ah

2-5 Student 1· 1 ep

Yu Si-an

2-5 Student 2· 1 ep

Jang Se-rim

2-5 Student 3· 1 ep

Lee Young-seok

2-5 Student 4· 1 ep

Ha-min

2-5 Student 5· 1 ep

Kim Hoe-chang

2-5 Student 6· 1 ep

Ha Bo-mi

2-5 Student 8· 1 ep

Kim Sun-je

2-5 Student 9· 1 ep

Yoo Ah-jin

2-5 Student 10· 1 ep

Gu Dong-woo

2-5 Student 11· 1 ep

Kim Seung-bu

2-5 Student 13· 1 ep

Jeong Ri-no

Student in Another Class· 1 ep

Bae Seaong-ho

Student in Another Class· 1 ep

Choi Chan

Male Teacher 1· 1 ep

Eom Ye-ji

Vice Chairperson· 1 ep

Kim Il-hyun

Ryu Gwang-pil's Aide· 1 ep

Hwa Sung

Jun-hyeong's Mother· 1 ep

Ji Yeon-ae

Gwang-su's Mother· 1 ep

Chu Eun-kyeong

Hak-jae's Mother· 1 ep

Kang Min-seung

Reporter in Principal's Office 1· 1 ep

Kwon Su-yeon

Reporter in Principal's Office 2· 1 ep

Park Kook-jin

Automobile Department 2· 1 ep

Shin June-woo

Automobile Department 3· 1 ep

Park Seok-sang

Automobile Department 4· 1 ep

Ahn Jae-hyung

Automobile Department 5· 1 ep

Cho Kang-hyuk

Automobile Department 6· 1 ep

Jang Jin-woo

Automobile Department 7· 1 ep

Lee Seop-geon

Automobile Department Martial Arts 1· 1 ep

Kang Jae-mook

Automobile Department Martial Arts 2· 1 ep

Hwang In-hwan

Automobile Department Martial Arts 3· 1 ep

Park Jun-woo

Automobile Department Martial Arts 4· 1 ep

Yoon Jae-min

Automobile Department Martial Arts 5· 1 ep

Ham Jae-hyun

Electrical Department 1· 1 ep

Lee Jae-yong

Electrical Department 3· 1 ep

Seo Ji-han

Electrical Department 4· 1 ep

Kim Han-yeong

Electrical Department 6· 1 ep

Hwang Woo-ju

Electrical Department 7· 1 ep

Choi Seong-jun

Electrical Department 8· 1 ep

Ko Jun-hyeong

Electrical Department 9· 1 ep

Lim Jae-min

Electrical Department Martial Arts 1· 1 ep

Im Da-bin

Electrical Department Martial Arts 3· 1 ep

Bae Hwan

Electrical Department Martial Arts 4· 1 ep

Kim Seo-pil

Electrical Department Martial Arts 2· 1 ep

Seo Eun-chong

Electrical Department Martial Arts 5· 1 ep

Jang So-mang

Female Teacher· 1 ep

Shin Yu-hwan

MZ Gangster 1· 1 ep

Ryu Han-jong

MZ Gangster 2· 1 ep

Ki Seong-gyu

MZ Gangster 3· 1 ep

Jang Doo-kyung

MZ Gangster 4· 1 ep

Yoo Young-bin

MZ Gangster 6· 1 ep

Jeong Jong-jin

MZ Gangster 7· 1 ep

Kim Seong-guk

MZ Gangster 8· 1 ep

Sim Gyeong-bo

MZ Gangster 9· 1 ep

Jin Hee-gyu

MZ Gangster 10· 1 ep

Kim Beom-chang

MZ Gangster 11· 1 ep

Park Chae-yi

Miss 1· 1 ep

Jang Eun-young

Miss 2· 1 ep

Joo Hyun-ji

Miss 3· 1 ep

Lee Han-bi

Miss 4· 1 ep

Hwang Chae-eun

Miss 5· 1 ep

Im Beom-su

Detention Center Student 1· 1 ep

Park Sung-hoon

Detention Center Student 2· 1 ep

Lee Jung-hyun

Detention Center Student 3· 1 ep

Ryu Jae-hyuk

Detention Center Student 4· 1 ep

Kim Da-yun

Bookstore Employee· 1 ep

Yang Ah-reum

Park Su-jin· 1 ep

Yoo Young-eun

3-4 Female Student 1· 1 ep

Lee Seo-yeon

3-4 Female Student 2· 1 ep

Geum A-yeon

3-4 Female Student 3· 1 ep

Kim Ha-yeon

3-4 Female Student 4· 1 ep

Kim Mi-jin

Soyeon Girls' High School Regular Student· 1 ep

Kim Se-yeon

Soyeon Girls' High School Regular Student· 1 ep

Kim So-wan

Soyeon Girls' High School Regular Student· 1 ep

Shin Soo-jin

Soyeon Girls' High School Regular Student· 1 ep

Won Ha-kyung

Soyeon Girls' High School Regular Student· 1 ep

You Xae-jin

Soyeon Girls' High School Regular Student· 1 ep

Jo Ha-min

Soyeon Girls' High School Regular Student· 1 ep

Ju Eon-ji

Soyeon Girls' High School Regular Student· 1 ep

Han Da-hee

Soyeon Girls' High School Regular Student· 1 ep

Seo Yun-jin

Ko Yeong-su's Daughter· 1 ep

Lee Sun-woo

Ko Yeong-su's Son· 1 ep

Lee Do-goon

Wrecker 1· 1 ep

Yoo Ji-hyuk

Public Prosecutor· 1 ep

Park Se-ki

Lawyer· 1 ep

Kim Se-joong

Prison Guard 2· 1 ep

Yang Min-ju

Soyeon Girls' High School Junior· 1 ep

Jeong Ho-won

Smoking Student 1· 1 ep

Kim Byung-tak

Smoking Student 2· 1 ep

Oh Dong-jin

Male Student· 1 ep

Mimiminu

Mimiminu· 1 ep

Lee Dong-ho

Private Teacher· 1 ep

Lee Eun-hak

Chukmyeong Foreign Language School Student 2· 1 ep

Lee Ah-hyun

Chukmyeong Foreign Language School Student 3· 1 ep

Song So-yeon

Chukmyeong Foreign Language School Student 4· 1 ep

Gang Dong-yun

Chukmyeong Foreign Language School Student 5· 1 ep

Kim Hyo-jin

Park Hyeon-ung's Mother· 1 ep

Lee Jun-ryeol

Male Student Accepted into University· 1 ep

Jo Hyo-eun

Han-rim Past Female Student 2· 1 ep

Kim Yun-chan

Principal· 1 ep

Sean Cho

Detective· 1 ep

Lee Sae-ro-mi

Judge· 1 ep

Lee Su-ho

Kang Seo-jun· 1 ep

Lee Geon-ha

Schoolboy 2· 1 ep

Joung Yoon-ah

Schoolgirl 2· 1 ep

Choi Yeon-hwa

Female Teacher 1· 1 ep

Ahn Hye-jin

Female Teacher 2· 1 ep

Lee Ji-yeon

Clinical Psychologist· 1 ep

Ahn Do-zin

Ji-seon's Boyfriend· 1 ep

Lee Ha-young

Ministry of Education Staff 3· 1 ep

Kim Chae-eun

Oh Yun-jin· 1 ep

Kim Dong-ryul

Red Name Tag· 1 ep

Kim Jeong-hoon

Red Name Tag· 1 ep

Kim Hyeon-ho

Red Name Tag· 1 ep

Lee Won-jun

Red Name Tag· 1 ep

Jang Min-jun

Red Name Tag· 1 ep

Jeong Gyu-yeong

Red Name Tag· 1 ep

Park Jin-su

Newly Admitted Inmate· 1 ep

Kim Da-hwi

General Inmate· 1 ep

Kim Yeon-jun

General Inmate· 1 ep

Park Eun-ho

General Inmate· 1 ep

Park Jae-beom

General Inmate· 1 ep

Seo Seung-jae

General Inmate· 1 ep

Yang Young-moon

General Inmate· 1 ep

Oh Dae-yang

General Inmate· 1 ep

Youn-ha

General Inmate· 1 ep

Jang Seong-won

General Inmate· 1 ep

Han Zi-hun

General Inmate· 1 ep

Hong Sung-bae

General Inmate· 1 ep

Lee Yeon-xin

General Inmate· 1 ep

Seo Jeong-min

Male Student from Hyeonjin Middle School 1· 1 ep

Oh Min-wook

Male Student from Hyeonjin Middle School 2· 1 ep

Lim Jin-sung

Male Student from Hyeonjin Middle School 3· 1 ep

Lee Ye-jin

Female Student from Hyeonjin Middle School 2· 1 ep

Mo Yoon-hee

Female Student from Hyeonjin Middle School 3· 1 ep

Jang Pil-sang

Teacher· 1 ep

Oh Joo-suk

Jinwon High School Security Guard· 1 ep

Na Kyung-chul

Reporter· 1 ep