Lee Han-wi

Go Pung-ho: a former criminal in real estate fraud, whom Doo-hak met in prison.

Kim Jeong-ho

Oh Kyung-soo, Min-hoo's doctor

Bae Goo-taek

Park Jae-han

Yook Jong-chul, Dong-sik's father.

Kim Moo-san, Uhm So-hye's husband (Ep. 16)

Wang Jae-gook

Ryu Eun-ho's father

Kim Young-sik (cameo)

Hong Pil-mok

Ha Ki-ho

Chae Won-sang, Ro-woon's father

Bang Sung-woo

Kwon Choon-sub

Park Dong-jin

Oh Kyung-soo, the 60-year-old father of Hae-young (just). He is talented in cooking and seems to be more patient and calm than Hae-young (just)'s mother.

Team Leader Song

Park Bong-joo

Gong Jong-bae, man of many trades in Sorang Town

Choi Nak-kwon

Oh Dong-choon, detective

Orphanage director

Team leader Kang

Joo Chul-soo

Dr. Jeon Hyung-seok (ep 1)

Doctor

Ban Soo-bong

Nam Yoo-sik, Da-jung's father who is suffering from Alzheimer's

Plastic surgeon (ep 5)

Joo Sung-hoon

Kim Pan-seok, Seo-won's father

Yoon Deok-myung

Woo Soo-chul, vice principal

Hwang Tae-san

Kevin Jang, Eun-jae's boss

Hwang Gye-bong/Director Sawatari

Im-ja

Heo Gab-soo

Director (cameo, ep 1)

Teriah Park

Na Kyung-man

Mr. Min

Woo Na-roo: Hodong's uncle, Yeo-rang's husband, great general of Goguryeo

Son Dong-sik (Min-joo's step-father)

Kang Chun-bae

Mr. Ku, a butcher who is infatuated with Eun-chan's mother

Ko Dal-soo: Mr. Hong's assistant. Always eager to help.

Lee Jong-tae, Soo-ho's father

Park Hyung-joon

High school teacher

Kim Yong-nam

Department head Jo

Im Dae-shik

Director Bang

Baek Joo-wan