Cheon Ho-jin

as Lee Sang-cheol (50 episodes)

as Director Son's Father

as Center Director (12 episodes)

as Kang Sang-mo (12 episodes)

as Grandpa Viva (16 episodes)

as Yoo Je-se (16 episodes)

as Yeom Je-ho (16 episodes)

as Seo Ki-tae (12 episodes)

as Nam Sang-bae (16 episodes)

as Song Young-dal (100 episodes)

as Teacher Park (32 episodes)

as Lee Bo-Hoon (16 episodes)

as Na Jeong-hyuk

as Seo Tae-Soo (52 episodes)

as Choi Gyeong-seok (16 episodes)

as Lawmaker Baek (16 episodes)

as Baek Do-ha (16 episodes)

as Jo Myung-chul

as Premier Kim Heon (18 episodes)

as Lee Seong-gye (50 episodes)

as Priest Kang

as Kang Jeong-sik

as Sa-hong

as Jang Tae-soo (50 episodes)