Bae Young-min (1 episode)

Su Ri-nam [Computer Repair Shop Owner] (3 episodes)

Na Kyung-soo

Ban Young-min (12 episodes)

Triplets

Lee Jeong-geun (Eps 8) (1 episode)

현철 (2 episodes)

Yang Jong-su

CEO Goo Chang-seo

Moon Myeong-jun (3 episodes)

Jang Yeon-woo (32 episodes)

In-guk

Seok Jun-im (2 episodes)

Yang Jong-su

Apt Man

Chul-bae

In-ho

Prosecutor Park

Barber (1 episode)

Taxi Driver (1 episode)

Doctor (1 episode)

NIS Team Leader

Lee Ji-hun (24 episodes)

Hairy

Nam-il

Hyun-seok

Seok-won

Jong-hyun

Gu Soo-han

Ki-hong's Friend

MC

Mr. Gye

Doctor

Himself

Gwak Gi-tae (18 episodes)