Kim Soo-hyun

as Jang Tae-yeong

Sung Dong-il

as Jo Won-geun

Lee Sung-min

as Choi Jin-gi

Sulli

as Song Yoo-hwa

Jo Woo-jin

as Sa Do-jin

Kim Hong-pa

as Choi Nak-hyeon

Jeong In-kyeom

as Professor Kim

Choi Kwon

as Manager Baek

Ko Kyu-pil

as Bald man

Lee Sa-rang

Director