Seo In-guk as Jo Won-il

Lee Jong-suk as Jung Woo-sang

Kwon Yu-ri as Jung-eun

Park Cheol-min as Jae-seok

Park Jung-chul as Coach Jang

Yoon Kyun-sang as Yoon Gyun-sang

Shin Min-chul as Jung-dong

Kim Jae-young as Dae-Chan

Sunwoo Jae-duk as Woo-sang's Father

Cho Ja-young as Se-mi

Jeon Bo-mi as Ha-na

Lee Chang-joo as Woo-hyeon

Park Yong-sik as President of the Association

Kim Young-sun as Woo-sang's Mother

Yang Joon-hyeok as Yang Joon-hyeok

Kim Jung-hak as Reporter Han

Kim Won-hyo as Key Man

Oh In-hye as Female Coach

Nam Da-reum as Young Jung Woo-sang

Yu Seung-yong as Young Jo Won-il

Park Hyun-woo as Jo Min-guk

Ahn Jang-hyeok as Prologue Commentator

Nam Doh-hyeong as Prologue Announcer