Sung Ji-ru

as Tae Jeong

as Detective Yu (12 episodes)

as Dr. Cho

as Park Young Il (2 episodes)

as Lee Dong-hyeok

as Heo Sang-soo (16 episodes)

as Jae-yong

as [Voice of Natsume] (8 episodes)

as Kwak Bong-pil (12 episodes)

as Yu-mi's father (1 episode), as Kim Man-Sik (8 episodes)

as Jang Cheol-jung (2 episodes)

as Byeong Tae / Choong Tae

as Jeong-kwon

as Seong-taek

as Jo Chang-Gil (32 episodes)

as Master Subori (20 episodes)

as Kim Bong-yong

as Byun Sung-ki (20 episodes)

as Booker

as Nam Tae-bong (10 episodes)

as co. president

as Shim Jong-soo (32 episodes)

as Choon-hwa's Lawyer

as Nam Tae-Sick (16 episodes)