Seo Kang-joon

as Namgung Ho (14 episodes)

as Seo Eun-ho (5 episodes)

as Jeong Hae-sung (12 episodes)

as Kim Sae-ha (10 episodes)

as Yi-kang

as Im Eun-seop (16 episodes)

as Kim Young-Koon (16 episodes)

as On Joon Young (16 episodes)

as Nam Shin / Nam Shin III (36 episodes)

as Kang-Joon Seo (1 episode)

as Do Yun's older brother (10 episodes)

as Cha Young-Bin (16 episodes)

as Lee Sang-Won (2 episodes)

as Baek In-ho (16 episodes)

as Sang-gyu

as Woo-jin 92

as Ah-rin's elder brother (12 episodes)

as Hong Joo-won (50 episodes)

as Choi Go (5 episodes)

as Joon-soo

as Self

as Yoon Eun-Ho (53 episodes)

as Self (46 episodes)

as Gook Seung-hyun (16 episodes)

as 尹河