Teach You A Lesson Kdrama

TEACH YOU A LESSON — GENDERS

Na Hwa-jin — Male Choi Gang-seok — Male Im Han-rim — Female Bong Geun-dae — Male Hwang Gi-tae — Male Lee Cheol-myeon — Male Choi Ga-yoon — Female Cho Gyu-cheol — Male Prison Guard Yoon — Male Kim Gyeong-min — Male Park Dae-seok — Male Ryu Jun-hyeong — Male Kim Gwang-su — Male Kim Hak-jae — Male Ryu Gwang-pil — Male Principal Kim — Male Lee Min-ji — Female Kim Na-rae — Female Lee Na-yun — Female Kim Hyeong-ju — Male Park Seong-hwan — Male Cho In-beom — Male Jang Kwon-hyuk — Male Du-mok — Male Lee Gwang-hee — Male Ham Jae-hyun — Male Jung Seon-yeong — Female Han Ye-ri — Female Ko Yeong-su — Male Jung So-yeong — Female Oh Jung-hwan — Male Park Hyeon-ju — Female Cheon Sang-yeol — Male Park Hyeon-ung — Male Jung Su-jeong — Female Choi Ji-seon — Female Lee Ji-young — Female Kim U-jin — Male Lee Young-mi — Female Principal Kim Ji-eun — Female Kang Seo-jun — Male Yeon-seo — Female Min Ji-ung — Male Yun Min-su — Male Lee Du-hyeon — Male Choi U-seong — Male Oh Yun-jin — Female Kim Su-gyeom — Male Kang Jun-man — Male Na Jung-hwan — Male Teacher Lee — Male Lee Jae-yun — Male Shin Ji-su — Female Ji Seong-bin — Male Jung Hyeon-min — Male Seo Beom-su — Male Jang Seong-gu — Male Lee Chi-ho — Male Lee Jong-su — Male Jung Hyun-tae — Male Ms. Min — Female Attorney Yoon Tae-gyeong — Male Lee Ji-hyo — Female Seo Jin-hyeok — Male Ham Yu-ri — Female Seo Tae-hoon — Male Named relatives Park Dae-seok's father — Male Kim Hyeong-ju's mother — Female Jung Su-jeong's mother — Female Park Hyeon-ung's father — Male Kim U-jin's father — Male Choi Ji-seon's mother — Female Kang Seo-jun's mother — Female Min Ji-ung's mother — Female Yun Min-su's father — Male Lee Du-hyeon's father — Male Choi U-seong's mother — Female Lee Jae-yun's father — Male Lee Jae-yun's mother — Female Jung Hyeon-min's mother — Female Jung Hyeon-min's father — Male Cho Da-hui's mother — Female Yeong-jun's mother — Female Jang Seong-gu's mother — Female Lee Chi-ho's mother — Female

TEACH YOU A LESSON — NAMED CHARACTERS & PERSONALITIES

This is for the 2026 Netflix K-drama Teach You a Lesson (Chamkyoyook / True Education), not a generic school-character list. The drama has a surprisingly large cast because almost every episode introduces a different school case.

MAIN CHARACTERS

Na Hwa-jin — Calm, fearless, extremely confident, observant, sarcastic, intimidating, disciplined, and calculating. He rarely panics and usually understands people before they understand him. Although his methods can be brutal, he has a powerful sense of justice and becomes especially angry when someone abuses a weaker person. He is also surprisingly playful and funny when relaxed.

Im Han-rim — Loud, bold, fearless, aggressive, energetic, unpredictable, and extremely confident. She genuinely enjoys intimidating people who deserve it. Beneath her explosive personality, however, she is compassionate and fiercely protective. She has almost zero tolerance for bullies.

Choi Gang-seok — Intelligent, authoritative, strategic, composed, stubborn, politically experienced, and determined. He thinks several moves ahead and understands how institutions and powerful people operate. He genuinely believes the education system needs drastic reform.

Bong Geun-dae — Intelligent, resourceful, tech-savvy, awkward, funny, adaptable, and more innocent-looking than the other inspectors. He isn't the terrifying fighter Hwa-jin or Han-rim is, but he is excellent at investigation and undercover work. He becomes surprisingly courageous when necessary.

HWANG GI-TAE'S GROUP

Hwang Gi-tae — Powerful, calculating, manipulative, ambitious, politically ruthless, and extremely dangerous. He understands how to use public opinion and political influence against his enemies. Rather than confronting people physically, he prefers controlling situations from behind the scenes.

Lee Cheol-myeon — Loyal to Gi-tae's political interests, calculating, opportunistic, and comfortable operating around powerful people.

CHOI GA-YOON CASE

Choi Ga-yoon — Kind, compassionate, trusting, gentle, empathetic, emotionally sincere, and idealistic. She believes people can change and tries to help those she thinks are suffering. Her greatest strength—her compassion—also makes her vulnerable because she can trust people too easily.

Cho Gyu-cheol — Manipulative, obsessive, unstable, possessive, deceptive, dangerous, and deeply resentful. He knows how to present himself as vulnerable when it benefits him but becomes frightening when he loses control.

DAEHAN SCHOOL — EPISODE 1

Park Dae-seok — Arrogant, spoiled, entitled, aggressive, disrespectful, and convinced that consequences don't apply to him. His father's influence gives him enormous confidence, making him comfortable humiliating teachers and other students.

Kim Gyeong-min — Rebellious, confrontational, aggressive, and part of the school's delinquent environment.

Ryu Jun-hyeong — Cocky, troublesome, disrespectful, and willing to follow the dominant students around him.

Kim Gwang-su — Rough, rebellious, intimidating, and comfortable participating in the school's disorder.

Kim Hak-jae — Defiant, unruly, and influenced by the school's delinquent hierarchy.

Ryu Gwang-pil — An adult caught inside a school where authority has largely collapsed; cautious and pressured by the environment surrounding him.

Lee Min-ji — A student living within the intimidating atmosphere created by the school's dominant troublemakers.

Kim Na-rae — Another student affected by the school's chaotic social environment.

Lee Na-yun — A student caught within the same dysfunctional school culture.

GUUN HIGH-TECH SCHOOL — EPISODE 2

Kim Hyeong-ju — Quiet, hardworking, academically motivated, vulnerable, and determined. He genuinely wants to study and improve his future rather than participate in the school's gang culture. His persistence makes him sympathetic but also puts a target on him.

Park Seong-hwan — Aggressive, intimidating, dominant, territorial, and deeply invested in the school's violent hierarchy.

Cho In-beom — Tough, confrontational, threatening, and accustomed to solving problems through intimidation.

Jang Kwon-hyuk — Physically intimidating, aggressive, confident, and dangerous.

Du-mok — Rough, threatening, loyal to the delinquent group, and comfortable using violence.

Lee Gwang-hee — A student connected to the school's difficult social environment.

Ham Jae-hyun — Another student living within the school's aggressive hierarchy.

SOYEON GIRLS' SCHOOL — EPISODE 3

Jung Seon-yeong — Dedicated, vulnerable, emotionally exhausted, caring, and increasingly overwhelmed by the impossible expectations placed on teachers.

Han Ye-ri — Strong-willed, confrontational, emotional, and central to the conflict surrounding Seon-yeong.

Ko Yeong-su — Aggressive, entitled, confrontational, and extremely protective of his own interests, even when his behavior harms others.

Jung So-yeong — Connected closely to the emotional conflict surrounding the case and affected by the actions of the adults around her.

Oh Jung-hwan — A supporting figure within the case who becomes involved in the escalating school conflict.

Park Hyeon-ju — A supporting student connected to the Soyeon Girls' High School situation.

CHUKMYEONG FOREIGN LANGUAGE SCHOOL — EPISODE 4

Cheon Sang-yeol — Authoritative, status-conscious, calculating, and strongly influenced by the competitive academic environment.

Park Hyeon-ung — Privileged, competitive, arrogant, academically pressured, and accustomed to adults protecting his future.

Jung Su-jeong — Intelligent, hardworking, pressured, vulnerable, and caught inside an education culture obsessed with academic achievement.

HYEONGJUNG SCHOOL — EPISODE 5

Choi Ji-seon — Young, emotionally affected by the adults surrounding her, and caught in a conflict she does not fully control.

Lee Ji-young — Caring but pressured, emotionally exhausted, and forced to deal with demanding parents and an increasingly difficult classroom situation.

Kim U-jin — Young, impulsive, difficult to discipline, and heavily influenced by the behavior and protection of adults around him.

Lee Young-mi — An adult whose actions and decisions become important to the conflict surrounding the children.

Principal Kim Ji-eun — Administrative, cautious, reputation-conscious, and concerned with managing the consequences of the school's conflict.

Kang Seo-jun — A young student affected by the conflict among classmates and parents.

Yeon-seo — A young student connected to the elementary-school case.

HYEONJIN SCHOOL — EPISODES 6–7

Min Ji-ung — Troubled, aggressive, impulsive, rebellious, emotionally volatile, and deeply influenced by his circumstances.

Yun Min-su — Delinquent, confrontational, easily influenced, and part of the dangerous group dynamic.

Lee Du-hyeon — Rebellious, aggressive, and involved in the escalating behavior of the group.

Choi U-seong — Reckless, troublesome, and heavily influenced by his peers.

Oh Yun-jin — A student connected to the wider conflict and consequences surrounding the group.

Kim Su-gyeom — Tough, confrontational, and connected to the violent social hierarchy surrounding the students.

Kang Jun-man — Stern, authoritative, hardened, and connected to the institutional side of the case.

Na Jung-hwan — Troubled and connected to the increasingly serious consequences of the students' behavior.

Teacher Lee — An educator dealing with a group of students whose behavior has moved far beyond ordinary classroom discipline.

NAKWON SCHOOL — EPISODE 7

Lee Jae-yun — Vulnerable, desperate, impulsive, increasingly trapped, and emotionally overwhelmed. His poor decisions become harder to escape as other people exploit him.

Shin Ji-su — Connected closely to Jae-yun's situation and affected by the same dangerous environment.

Ji Seong-bin — Manipulative, opportunistic, and involved in exploiting vulnerable students.

SEUNGYEON SCHOOL — EPISODE 8

Jung Hyeon-min — Intelligent, hardworking, academically capable, exhausted, anxious, heavily pressured, and increasingly unable to cope with the expectations placed upon him.

Jung Hyeon-min's Mother — Obsessive, controlling, demanding, status-conscious, and frighteningly focused on her son's academic success. She convinces herself that extreme behavior is justified because she is securing his future.

Jung Hyeon-min's Father — More passive than his wife and caught within the unhealthy family dynamic surrounding their son's education.

Cho Da-hui — A student connected to the intense academic competition surrounding Hyeon-min.

Yeong-jun — Another student caught within the highly competitive academic environment.

Seo Beom-su — Connected to the broader circumstances surrounding the students and the investigation.

JINWON SCHOOL — EPISODES 9–10

Jang Seong-gu — Charismatic but dangerous, manipulative, aggressive, exploitative, confident, and skilled at controlling vulnerable people. He understands social pressure and uses it as a weapon.

Lee Chi-ho — Vulnerable, easily influenced, emotionally conflicted, and desperate to belong. His desire for acceptance makes him particularly easy for stronger personalities to exploit.

Lee Jong-su — Connected to the dangerous student circle and willing to participate in its activities.

Jung Hyeon-tae — Rebellious, aggressive, and part of the increasingly dangerous group surrounding the school.

Ms. Min — Concerned, observant, responsible, and caught between protecting students and dealing with a situation that has grown beyond normal school discipline.

Lee Ji-hyo — Connected to the students and circumstances surrounding the Jinwon High School investigation.

Seo Jin-hyeok — Involved in the wider criminal/exploitative situation surrounding the students.

Ham Yu-ri — A student appearing during the final conflict and connected to the consequences of the earlier school cases.

Seo Tae-hoon — A supporting character appearing during the final stage of the story.

THE PERSONALITIES IN ONE LINE

Na Hwa-jin — Calm + calculating + terrifying + protective Im Han-rim — Explosive + fearless + funny + protective Choi Gang-seok — Strategic + authoritative + determined Bong Geun-dae — Smart + awkward + resourceful + brave Choi Ga-yoon — Gentle + trusting + compassionate Cho Gyu-cheol — Obsessive + manipulative + dangerous Hwang Gi-tae — Powerful + calculating + ruthless Park Dae-seok — Spoiled + arrogant + entitled Kim Hyeong-ju — Quiet + hardworking + determined Park Seong-hwan — Dominant + violent + intimidating Cho In-beom — Aggressive + threatening + confrontational Jang Kwon-hyuk — Tough + violent + intimidating Du-mok — Rough + aggressive + loyal Jung Seon-yeong — Caring + dedicated + overwhelmed Han Ye-ri — Emotional + confrontational + strong-willed Ko Yeong-su — Entitled + aggressive + confrontational Park Hyeon-ung — Privileged + competitive + arrogant Jung Su-jeong — Smart + hardworking + pressured Choi Ji-seon — Young + vulnerable + emotionally affected Lee Ji-young — Caring + pressured + exhausted Kim U-jin — Impulsive + difficult + protected Kang Seo-jun — Young + vulnerable + affected Min Ji-ung — Troubled + rebellious + volatile Yun Min-su — Delinquent + aggressive + influenced Lee Du-hyeon — Rebellious + confrontational + reckless Choi U-seong — Reckless + troublesome + impressionable Kim Su-gyeom — Tough + aggressive + confrontational Na Jung-hwan — Troubled + reckless + vulnerable Lee Jae-yun — Desperate + vulnerable + trapped Shin Ji-su — Vulnerable + involved + conflicted Ji Seong-bin — Opportunistic + manipulative + exploitative Jung Hyeon-min — Intelligent + exhausted + pressured Cho Da-hui — Competitive + pressured + academically driven Yeong-jun — Pressured + competitive + stressed Jang Seong-gu — Charismatic + manipulative + dangerous Lee Chi-ho — Vulnerable + impressionable + conflicted Lee Jong-su — Rebellious + involved + reckless Jung Hyeon-tae — Aggressive + rebellious + dangerous Ms. Min — Responsible + concerned + observant Lee Ji-hyo — Involved + vulnerable + affected Seo Jin-hyeok — Manipulative + opportunistic + dangerous Ham Yu-ri — Young + affected + resilient

EXTRA

Prison Guard Yoon — A prison guard connected to the Choi Ga-yoon and Cho Gyu-cheol storyline.

Principal Kim — The principal of Daehan High School. Cautious, authority-conscious, and caught in the chaos created by the school's problem students.

Lee Gwang-hee — A student at Guun High-Tech High School connected to the school's delinquent environment.

Ham Jae-hyun — A student at Guun High-Tech High School involved in the school's troubled student culture.

Jung So-yeong — A character involved in the Soyeon Girls' High School case and connected to Jung Seon-yeong's storyline.

Oh Jung-hwan — A named character involved in the Soyeon Girls' High School case.

Park Hyeon-ju — A named character appearing during the Soyeon Girls' High School case.

Cheon Sang-yeol — A major adult figure in the Chukmyeong Foreign Language High School case. Authoritative, respected, serious, and central to the mystery surrounding the incident at the school.

Park Hyeon-ung — A student at Chukmyeong Foreign Language High School. Competitive, pressured, emotionally complicated, and central to the episode's investigation.

Jung Su-jeong — A student at Chukmyeong Foreign Language High School. Intelligent, academically pressured, and central to the truth behind the school's case.

Choi Ji-seon — A young student at Hyeongjung Elementary School. Vulnerable and caught in a conflict largely created by the adults around her.

Lee Ji-young — A central adult in the Hyeongjung Elementary School case. Pressured, emotionally exhausted, and struggling with an increasingly difficult situation.

Kim U-jin — A young student involved in the Hyeongjung Elementary School conflict.

Lee Young-mi — An adult involved in the conflict surrounding the elementary-school students.

Principal Kim Ji-eun — Principal of Hyeongjung Elementary School. Administrative, cautious, and responsible for dealing with the escalating dispute.

Kang Seo-jun — A young student involved in the Hyeongjung Elementary School case.

Yeon-seo — A young student appearing in the Hyeongjung Elementary School storyline.

Oh Yun-jin — A student appearing in the Hyeonjin Middle School case.

Kang Jun-man — An important adult figure in the Hyeonjin Middle School storyline. Stern and authoritative.

Teacher Lee — A teacher involved in the Hyeonjin Middle School case.

Lee Jae-yun — A student at Nakwon High School. Vulnerable, desperate, impulsive, and increasingly trapped by his circumstances.

Shin Ji-su — A student connected closely to Lee Jae-yun's storyline.

Ji Seong-bin — A central figure in the Nakwon High School conflict. Manipulative, opportunistic, and willing to take advantage of vulnerable people.

Jung Hyeon-min — A student at Seungyeon High School. Intelligent, hardworking, exhausted, anxious, and under enormous academic pressure.

Seo Beom-su — A named character involved in the Seungyeon High School case.

Jang Seong-gu — A major student in the Jinwon High School case. Charismatic, manipulative, confident, dangerous, and skilled at influencing other students.

Lee Chi-ho — A student at Jinwon High School. Vulnerable, impressionable, conflicted, and desperate for acceptance.

Lee Jong-su — A student involved with Jang Seong-gu's group.

Jung Hyun-tae — A student connected to the dangerous Jinwon High School group. Rebellious, confrontational, and reckless.

Ms. Min — An adult at Jinwon High School. Concerned, responsible, observant, and involved in dealing with the students' escalating situation.

Attorney Yoon Tae-gyeong — An attorney appearing during the Jinwon High School case.

Lee Ji-hyo — A named character involved in the Jinwon High School storyline.

Seo Jin-hyeok — A character involved in the Jinwon High School case and its wider criminal/scam-related storyline.

Ham Yu-ri — A named student appearing in Episode 10.

Seo Tae-hoon — A named character appearing in Episode 10.

NAMED RELATIVES

These people are individually credited but the series does not give them personal names, so they should not be confused with fully named characters:

Park Dae-seok's father — Powerful, influential, protective of his son, and accustomed to using his position.

Kim Hyeong-ju's mother — Hyeong-ju's mother.

Jung Su-jeong's mother — Su-jeong's mother.

Park Hyeon-ung's father — Hyeon-ung's father.

Kim U-jin's father — U-jin's father.

Choi Ji-seon's mother — Ji-seon's mother.

Kang Seo-jun's mother — Seo-jun's mother.

Min Ji-ung's mother — Ji-ung's mother.

Yun Min-su's father — Min-su's father.

Lee Du-hyeon's father — Du-hyeon's father.

Choi U-seong's mother — U-seong's mother.

Lee Jae-yun's father — Jae-yun's father.

Lee Jae-yun's mother — Jae-yun's mother.

Jung Hyeon-min's mother — Extremely demanding, controlling, academically obsessive, and convinced that pushing her son is necessary for his future.

Jung Hyeon-min's father — More passive within the family's intense academic environment.

Cho Da-hui's mother — A parent involved in the competitive education environment.

Yeong-jun's mother — Another parent involved in the Episode 8 academic-pressure storyline.

Jang Seong-gu's mother — Seong-gu's mother.

Lee Chi-ho's mother — Chi-ho's mother.

IMPORTANT CORRECTION

Some people I previously treated as if they had fully established personalities are actually very minor characters. For those characters, it is better to describe their role rather than make up personality traits.

The verified individually named characters across the series therefore include:

Na Hwa-jin Choi Gang-seok Im Han-rim Bong Geun-dae Hwang Gi-tae Lee Cheol-myeon Choi Ga-yoon Cho Gyu-cheol Prison Guard Yoon Kim Gyeong-min Park Dae-seok Ryu Jun-hyeong Kim Gwang-su Kim Hak-jae Ryu Gwang-pil Principal Kim Lee Min-ji Kim Na-rae Lee Na-yun Kim Hyeong-ju Park Seong-hwan Cho In-beom Jang Kwon-hyuk Du-mok Lee Gwang-hee Ham Jae-hyun Jung Seon-yeong Han Ye-ri Ko Yeong-su Jung So-yeong Oh Jung-hwan Park Hyeon-ju Cheon Sang-yeol Park Hyeon-ung Jung Su-jeong Choi Ji-seon Lee Ji-young Kim U-jin Lee Young-mi Principal Kim Ji-eun Kang Seo-jun Yeon-seo Min Ji-ung Yun Min-su Lee Du-hyeon Choi U-seong Oh Yun-jin Kim Su-gyeom Kang Jun-man Na Jung-hwan Teacher Lee Lee Jae-yun Shin Ji-su Ji Seong-bin Jung Hyeon-min Seo Beom-su Jang Seong-gu Lee Chi-ho Lee Jong-su Jung Hyun-tae Ms. Min Attorney Yoon Tae-gyeong Lee Ji-hyo Seo Jin-hyeok Ham Yu-ri Seo Tae-hoon

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Everyone is over 18. I mean EVRYONE. They've all grown.