A boy falls to his death at school, but Ok Chan-mi does not believe that her twin brother, Park Won-seok, committed suicide. Chan-mi transfers to her brother's school, Yongtan High, and meets Ji Soo-heon, who witnessed her brother's death. A "hero," who avenges bullied students, appears at Yongtan High. Chan-mi speculates that it may be connected to her brother and starts looking for this hero.
Shin Ye-eun
Ok Chan-mi
Lomon
Ji Soo-heon
Seo Ji-hoon
Seok Jae-beom
Chae Sang-woo
Ki Oh-seong
Lee Soo-min
Gook Ji-hyun
Chung Su-bin
Tae So-yeon
Kim Joo-ryoung
Jin So-jeong
Wooyeon
Hong Ah-jung
Jin Ho-eun
Sa Joong-kyung
A boy falls to his death at school, but Ok Chan-mi does not believe that her twin brother, Park Won-seok, committed suicide. Chan-mi transfers to her brother's school, Yongtan High, and meets Ji Soo-heon, who witnessed her brother's death. A "hero," who avenges bullied students, appears at Yongtan High. Chan-mi speculates that it may be connected to her brother and starts looking for this hero.
![Trailer [Subtitled]](https://i.ytimg.com/vi_webp/9gjMIeMksnQ/hqdefault.webp)
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