ONE: High School Heroes (2025) K-Drama: Episode Guide, Plot, Cast & Streaming Details

ONE: High School Heroes (ONE: 하이스쿨 히어로즈) is a 2025 South Korean action coming-of-age television series that delves into themes of school violence, personal trauma, and the fight for justice. Directed by Lee Seong-tae and written by Kim Young-eun, the series stars Lee Jung-ha and Kim Do-wan in lead roles. The drama premiered on May 30, 2025, on Wavve, with episodes released weekly.

Release Date & Schedule of ONE: High School Heroes Episodes:

The series comprises 8 episodes, released in batches over three weeks.

Full Release Timeline:

• Episodes 1–4 – Friday, May 30, 2025

• Episodes 5–6 – Friday, June 6, 2025

• Episodes 7–8 – Friday, June 13, 2025

Plot Overview:

ONE: High School Heroes follows Kim Ui-gyeom (Lee Jung-ha), a model student who has always focused solely on his studies. However, he faces domestic abuse from his father and bullying at school. When his suppressed rage reaches a boiling point, he discovers his natural fighting talent. Together with Kang Yoon-ki (Kim Do-wan), a classmate who recognizes Ui-gyeom’s abilities, they form the masked vigilante group “High School Heroes” to combat school violence and protect victims.

Cast:

Main Cast:

• Lee Jung-ha as Kim Ui-gyeom
  A top student who, after enduring domestic abuse and school bullying, awakens his fighting instincts to stand up against violence.

• Kim Do-wan as Kang Yoon-ki
  A classmate who identifies Ui-gyeom’s potential and becomes his partner in forming the “High School Heroes.”
  

   

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Supporting Cast:

• Kim Sang-ho as Kim Seok-tae
  Ui-gyeom’s father, whose oppressive nature contributes to his son’s trauma.

• Kim Joo-ryoung as Myeong Da-bin
  Ui-gyeom’s mother, who begins to change to protect her son.

• Lim Sung-kyun as Kim Seung-joon
  A student involved in the school’s hierarchy of violence.

• Yuk Jun-seo as Lee Geol-jae
  A character whose story unfolds as the series progresses.

Where to Watch ONE: High School Heroes?

In South Korea, ONE: High School Heroes is available on Wavve. International viewers can stream the series on platforms like Plex and Dailymotion.