Lee Joon-ik Director Kim Go-eun Sun-mi Actor Park Jeong-min Hak-soo Actor Jang Hang-sun Hak-soo's father Actor Jeong Gyu-su Sunmi's father Actor Shin Hyun-bin Migyeong Actor Go Joon Yongdae Actor Kim Joon-han Wonjun Actor Jung Sun-chul Jungsik Actor Kim Sae-gyeom Screenwriter Kim Seong-chul Producer Lee Eui-tae Cinematographer Yoo Hyeok-jun Lighting Bang Junseok Music