Lee Dae-yeon

Jang Hyun-seok, he runs 'Hana Mandu', and a neighbor who is loved for his simple and good looks even though he is very wealthy. He is like a benefactor to Dong-hee (single mother) and a strong supporter.

Baek Jun-sik, head of SMPA's Criminal division.

Kim Pan-seok (Ep. 7 & 9)

Cha Man-jong, Cha Eun-dong father, a former priest, he got a job as a security officer at the hospital where Hye-won works, and he faced a mysterious accident there. (Special appearance)

Kim Jong-moo, general manager of the Vikings.

Seo Cheon-shik

Shin Goo-cheol

Woo Hyung-man

A husband (Ep. 1)

Han Young-cheol

Captain Yoo Jung-man

Professor Hwang, her teacher and superior at the hospital.

Yoon Dong-chul

Woo-joo's father

Lee Kyung-shik

Min Yong-jae

Shin Myung-ho

Choe Man-ri

Jang Myung-moon

Han Ki Joon (Han Tae Kyung's father)

Kim Han-doo

Jung Do-joon, Se-ro's father

Kang Joo-wan

Kim Jae-soo

Kim Hyung-man

President Choi

Hwang Cheol-goo - The director of the Paran Clinic.

Policeman Moon

President Yeom

Kim Kyung-pil

So Sun-woo

Gwon Ram

Eom Dae-yong

Cameo

Park Chil-nam (husband)

Det. Go Byung-chun

Mun Inbang

Choi Ki-ja

Gyung Gi-do

Kim Il-bong

Noh Dong-seok, Eastern medicine doctor