ONE: High School Heroes | Final Trailer | Lee Jung-Ha | Kim Do-Wan

The countdown is over — ONE: High School Heroes reveals its explosive Final Trailer. Packed with raw energy, the story follows Lee Jung-Ha as the determined underdog, fighting against corruption and bullies with unshakable courage. Beside him, Kim Do-Wan brings intensity as a loyal friend whose fists and spirit burn with justice.

From heart-pounding rooftop clashes to brutal after-school battles, every scene radiates grit, loyalty, and the fire of youth. Hidden rivalries erupt, brotherhood is tested, and legends are forged in sweat and sacrifice. The trailer teases not just fights, but the journey of young heroes who rise above fear to protect what matters most.
This is not just a schoolyard drama — it’s a call to stand tall when the world pushes you down. Victory or defeat, their courage will inspire a generation.