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
Lomon
Seo Ji-hoon
Chae Sang-woo
Lee Soo-min
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Score: 8.2
Score: 7.6
Score: 8.8
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Score: 7.8
Score: 8.0
