Lee Joon-gi

Baek Hee-sung / Do Hyun-soo

이준기

Moon Chae-won

Cha Ji-won

문채원

장희진

Do Hae-soo

Seo Hyeon-woo

Kim Moo-jin

서현우

Jung Seo-yeon

Baek Eun-ha

남기애

Gong Mi-ja

Son Jong-hak

Baek Man-woo

손종학

Jo Kyung-sook

Moon Young-ok

조경숙

Choi Dae-hoon

Lee Woo-chul

최대훈

Choi Young-joon

Choi Jae-sup

최영준

김수오

Im Ho-joon

임철형

Yoon Sang-pil

양혜진

Kang Pil-young

Ju Ye-eun

Reporter Joo

홍서준

Chief Kang

Park Hyun Joon

Young Do Hyun-soo

임나영

Young Do Hae-soo

정택현

Young Kim Moo-jin

Choi Byung-mo

Do Min-seok

최병모

Kim Ji-hoon

Baek Hee-sung

김지훈

이주연

Park Seo-young

신서우

[Apartment boy]

Choi Kwon Soo

Baek Hui Seong [Teen]

하민

School Counselor

Choi Young-woo

Lee Tae‑seop

최영우

서예희

Yoon Ji-hoon's mother

문하연

Jang Young-hee's Daughter