True education

There were bullyings, fights, humiliation and quarrels at school
So Shi Min: female, brief personality: a determined and reserved teacher who initially tries to avoid conflicts to secure a permanent position, but does not tolerate injustice. A former hapkido champion, she knows how to stand up for herself and defends those who are being bullied. By day, she's an exemplary teacher; by night, she sometimes acts as a masked vigilante.
Name: Na Gyeon.
Character: female, tough and straightforward teacher, fiercely fights bullying, is not afraid to shout and act harshly - all for the sake of protecting the weak.
Name: Kim Han Gyu.
Personality: Male, principled and firm teacher, does not tolerate bullying, acts calmly but uncompromisingly - protects students and does not allow bullying incidents to be hushed up.
Name: Moon Dong Eun.
Personality: A calculating and cold-blooded female teacher, she's been plotting revenge for years and never backs down. Despite her ruthlessness, she knows how to recognize those who truly need help and supports those who have also been bullied. She keeps her emotions in check and strikes precisely at her enemies' weak points, but behind this cold determination lies pain and a desire to restore justice.