Keys to the Heart

Lee Byung-hun

Kim Jo-ha

Youn Yuh-jung

In-sook

Park Jeong-min

Jin-tae

Han Ji-min

Ga-yool

Kim Sung-ryung

Ms. Hong

Choi Ri

Soo-jung

Bek Hyun-jin

Dong-soo

Hwang Seok-jeong

Chief Kang

Park Ji-yeon

Yougn In-sook

Moon Sook

Bok-ja

Oh Hye-won

Bok-ja's Guard

Lee Zoo-young

Eun-ha

Ahn Seong-bong

Sky Lounge Manager

Park Ji-hoon

Tae-gu

Park Soo-oh

Young Jo-ha

Yoon Yeong-gyun

Policeman

Son Woo-hyuk

Eun-ha's Boyfriend

Yang Jun-seok

Big High School Student

Kim Sang-wook

Jung Yun-ha

Bok-ja's Guard

Jo Kwan-woo

Moon Sung-gi

Yoon Young-kyun

Police substation officer