Woo-jin
So Ji-sub
Soo-a
Son Ye-jin
Ji-ho
Park Seo-jun
Han Bok-nyeo
Gong Hyo-jin
Seo-bin
Lee Min-sung
PE Teacher
Lee Seung-joon-III
Homeroom Teacher
Shin Woo-hee
Relative
Jo Ha-seok
Bus Driver
Seo Young-sam
Young Ji-ho
Kim Ji-hwan
Hong-gu
Ko Chang-seok
Swimming Instructor
Lee Jun-hyeok
Hyun-jung
Son Yeo-eun
Young Woo-jin
Lee You-jin
Young Soo-a
Kim Hyun-soo
Young Hong-goo
Bae Yoo-ram
Seo-bin's Mother
Seo Jeong-yeon
Screenplay
Lee Jang-hoon
Director
Music
Bang Jun-seok
Executive Producer
Cha Won-chun
Props
Park Jae-wan
Producer
Yang Soo-jung
Martial Arts Choreographer
Yoon Dae-won
Adaptation
Kim Jae-joong
Matte Painter
Bae Sang-min
Novel
Takuji Ichikawa
Co-Producer
Kim Woo-jae
Lighting Director
Park Jun-gyu
Digital Colorist
Eom Tae-sik
Kang Su-Jin
Editor
Nam Na-young
Production Design
Choi Ki-ho
Key Grip
Kim Seong-o
Director of Photography
Cho Sang-yun
Costume Design
Kim Jung-won
Makeup & Hair
Lee Seo-jin
"B" Camera Operator
Wang Ho-sang