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 , Chung Su-bin , Kim Joo-ryoung , Wooyeon , Jin Ho-eun , Yeon Oh
Studio S
