Connection

Ji Sung

Jang Jae-gyeong

14 episodes

Jeon Mi-do

Oh Yoon-jin

14 episodes

Lee Hyun So

Park Joon-Seo (teen)

14 episodes

Kwon Yul

Park Tae-jin

14 episodes

Kim Kyung-nam

Won Jong-soo

14 episodes

Lee Sang-jun

Kim U-sung

14 episodes

Jung Yoo-min

Choi Ji-yeon

14 episodes

Jung Soon-won

Heo Joo-song

14 episodes

Yoon Na-moo

Park Jun-seo

14 episodes

Seo Yi-ra

Oh Soo-hyun

14 episodes

Jeong Jae-kwang

Kim Chang-soo

14 episodes

Cha Yeob

Oh Chi-hyeon

14 episodes

Lee Kang-wook

Jung Yoon-ho

14 episodes

Cho Han-gyeol

Young Jang Jae-gyeong

14 episodes

Kim Min-ju

Young Oh Yoon-jin

14 episodes

Park Keun-rok

Jung Sang-eui

14 episodes

Yoo Hee-je

Gong Jin-wook

14 episodes

Ryu Hye-rin

Kang Si-jung

14 episodes

Park Jung-pyo

Yoo Gyeong-hwan

14 episodes

Yoon Sa-bong

Jung Yeon-joo

14 episodes

Moon Sung-keun

Won Chang-ho

14 episodes

Han Hyeon-jun

Min Hyeon-woo

14 episodes

Kim Mi-ji

Nurse (Eps 1-2)

2 episodes

Do Geon-wu

Min-ho

2 episodes