Choi Shang

as Hwang Jin-gu (101 episodes)

as Lee Yeon-seok (16 episodes)

as Lee Yoon-Sung (16 episodes)

as Sung-Hoon (18 episodes)

as Kang Tae Joo (2 episodes)

as Ryu Hyun-Woo (16 episodes)

as Yoon Sung-Il (119 episodes)

as Detective Lee (5 episodes)

as Teacher Ma (16 episodes)

as Yook Jung-yub

as Kim Baek-gi (51 episodes)

as Choi Joon-Young (125 episodes)

as Nemo (20 episodes)

as Jo Byung-Ki (16 episodes)

as Ki-ho