Jeon Kuk-hwan

as Jeon Mu-tae (8 episodes)

as Jun-seo's Grandfather (4 episodes)

as Park Myeong-jin (12 episodes)

as Lee Mun-gyu (10 episodes)

as Kang Guen-cheol (16 episodes)

as Ma Joong-do (24 episodes)

as Won Hyeong-sool

as Lee Byung-wook (16 episodes)

as Chairman Kang Seonggeun (16 episodes)

as Han Pan-ro (16 episodes)

as Kim Gun-Young (16 episodes)

as Han Young-sik (16 episodes)

as Byeon Seung-il

as Kim Han-yong (16 episodes)

as Hong Jin-beom (1 episode)

as Ri Choong-ryeol (10 episodes)

as 성현구 (1 episode)

as Hyeong-min's Father

as Kim Yong (10 episodes)

as Executive Director Wang (16 episodes)

as Lee Gwang-Ho (40 episodes)

as Soo Kyung's father (5 episodes)

as Won Hyeong-sool

as Son Ee-sung (20 episodes)

as Yeo Bong (61 episodes)