as Kim Woo-hyun / Park Gi-young

as Yoo Kang-mi

as Jo Hyun-min

as Kwon Hyuk-joo

as Choi Seung-yeon

as Park Ki-young

as Han Young-seok

as Shin Kyung-soo

as Jeon Jae-wook

as Kim Seok-joon

as Im Chi-hyun

as Shin Hyo-jung

as Kwon Do-young

as Cameo

as Byeon Sang-woo

as Oh Yeon-suk

as Cho Gyeong-sin

as Cho Jae-min

as Executive Moon

as Shin Hyo-jung's fan