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ONE: High School Heroes began airing on May 30, 2025, and has since garnered attention for its storyline, action scenes, and stellar cast. The drama series is based on the popular webtoon of the same name, which surpassed a readership of 65 million.
The show features young, talented actors, including Moving actor Lee Jung-ha as the lead named Kim Eui-gyeom. He is joined by My Roommate is a Gumiho star Kim Do-wan who plays the role of Kang Yun-ki. Besides Lee Jung-ha and Kim Do-wan, ONE: High School Heroes features Hong Min-gi, Yoo Hee-jae, Yuk Jun-seo, Lim Sung-kyun, and Shin Hyun-soo.
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Kim Eui-gyeom and Kang Yun-ki start an operation together to tackle the power hierarchy of violence in school. They wear red masks to hide their identity since they are battling brutes in and out of their school.
Fans of the show have been curious about the actors and their social media pages as well as the previous dramas they were a part of.
ONE: High School Heroes Cast: ages, Instagram pages, previous dramas, and more
1) Lee Jung-ha (@jungha.km)
Lee Jung-ha is a 26-year-old South Korean actor, who was born on February 23, 1998. He gained fame through his role as Kim Bong-seok in the Disney+ sci-fi action drama Moving. He has also appeared in other shows like The Auditors, Nevertheless, Run On, and Rookie Historian Goo Hae-Ryung.
Lee Jung-ha has around 887K followers on his Instagram page @junha.km.
2) Kim Do-wan (kimdwan_)
ONE: High School Heroes star Kim Do-wan is a 30-year-old South Korean actor born on March 8, 1995. The actor gained fame through his roles in dramas like Start-Up, My Roommate Is A Gumiho, Big Mouth, and more.
Kim Do-wan is best known for his performance in the 2024 drama Wedding Impossible as Lee Do-han.
He has over 1.1 million followers on his Instagram page @kimdwan_.
3) Hong Min-gi ()
South Korean actor 23-year-old Hong Min-gi, plays the role of Kim Nam-hyub, a brute who oppressed students in the Wavve drama. He was born on March 12, 2002, and gained attention for his roles in Crushology 101, Study Group, and Love Your Enemy.
Fans can follow him on Instagram @minggi._.jeok, where he has over 871k followers.
4) Yuk Jun-seo (6dory)
Yuk Jun-seo is a 29-year-old actor born on April 1, 1996. He is a former UDT soldier who transitioned into an artist. He played the role of mysterious student Lee Geol-jae in the Wavve original series.
He gained attention among netizens in 2021 through his appearance as a UDT soldier on the show named The Iron Squad. He previously appeared in the Netflix series Sweet Home 2 & 3 and also attracted fans through the dating show Single's Inferno 4.
He boasts over 564K followers on his Instagram page, @6dory.
4) Yoo Hee-jae (yoo_heej)
Yoo Hee-jae is a 34-year-old actor born on July 10, 1990, who portrayed the character of the antagonist Choi Ki-soo in ONE: High School Heroes.
The actor has appeared in several K-dramas including Connection, Welcome to Samdal-ri, Big Bet seasons 1 & 2, and Delightfully Deceitful. He also appeared in the Korean film On Your Wedding Day, starring Park Bo-young and Kim Young-kwang.
He has 37K followers on his Instagram page named @yoo_heej.
5) Lim Sung-kyun (limskk__)
Lim Sung-kyun is a 29-year-old actor born on March 20, 1996. He plays the role of Kim Seung-joon, Kim Eui-gyeom’s rival at first but eventually becomes his friend.
Lim Sung-kyun was previously seen in dramas like Sh**ting Stars, Not Others, The Escape of the Seven, and Maestra: Strings of Truth.
He has around 176K followers on his Instagram profile @limskk__.
Viewers can tune in on Wavve to stream ONE: High School Heroes.
