Season guide
ONE: High School Heroes: Season 1
8 episodes
Premiered May 30, 2025 Updated Jul 19, 2026
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Episodes
S1·E1
Episode 1
May 30, 2025 · 51 min
“How are you going to fight tomorrow? It starts tomorrow." After losing the cassette, Ui-Gyeom meets Yoon-Ki and their normal life is shaken up.
S1·E2
Episode 2
May 30, 2025 · 46 min
“Fighting is a talent, after all.” After a fight with Seung-joon, he encounters an unexpected accident.
S1·E3
Episode 3
May 30, 2025 · 47 min
“I don't want to give in, not to them...” The resolve to fight back. Despair, visions, and an unexpected hand lead him on.
S1·E4
Episode 4
May 30, 2025 · 41 min
“The problem is there are too many bad guys in the world." Anger with nowhere to go and shaky justice. Yun and Yi decide to “revolutionize.