Kim Min-ho

as Park Min-seok

as Buldak

as Hippo

as Son Hyeong-min (12 episodes)

as Bae Seong Gyu [Detective] (8 episodes)

as Seo Yun-taek (9 episodes)

as Bok-an

as Bang Cheol-jin

as Park Min-seok (60 episodes)

as Kim Gi-chang (1 episode)

as Baek Jun-kyu (16 episodes)

as Xiao Fang

as Baek Seok-Hee (20 episodes)

as Jo Suk's friend (2 episodes)

as Seon-Hee