Guard pass

Meet Lim Sejun, a big guy who loves to eat and doesn’t mind being teased about his weight. He’s got a strong personality and high self-esteem, and his only friend is Seo Hajin, who’s been learning jiu-jitsu to protect him since they were kids. When Hajin defends Sejun from a classmate, things take a dark turn when she’s assaulted and left with serious injuries.

Sejun reports the incident to the police, but when the investigation stalls, he takes matters into his own hands. After a failed attempt to confront the criminal, Sejun is defeated by a bully who knows jiu-jitsu. Determined to seek justice, Sejun begins training with a mysterious man named Jason and transforms both physically and mentally.

After three months of intense training, Sejun sets out to take down the veiled organization behind the attacks. This school action drama follows Sejun’s journey of revenge and redemption as he faces off against his enemies and fights to protect those he cares about.