Teach You a Lesson, Study Group, and Weak Hero are among the most popular K-dramas right now. Here's why these school action series feel so similar and why fans around the world can't stop watching them.

Many viewers have wondered whether Netflix's Teach You a Lesson is based on a true story. While the K-drama is fictional, several episodes share surprising similarities with real-life Korean cases involving school bullying, teacher harassment, juvenile crime, and academic pressure.

Loved Jin Ki-joo as Im Han-rim in Teach You a Lesson? Here are seven must-watch K-dramas starring the actress, including My Perfect Stranger, Undercover High School, The Secret Life of My Secretary, and more.