Inspector Koo

Lee Young-ae

Koo Kyung-yi

Kim Hye-jun

Song Yi-kyung / "K"

Kim Hae-sook

Director Yong

Kwak Sun-young

Na Je-hui

Baek Sung-chul

Santa

Cho Hyun-chul

Oh Gyeong-su

Lee Hong-nae

An Geon-uk

Jeong Seok-yong

Mr. Kim

Jeong Jong-jun

Je-hui's father

Park Kang-seop

Lee Dae-ho

Bae Hae-seon

Jung Jeong-yeon

Choi Young-jun

Jang Seong-u

Park Ji-bin

Heo Hyeon-tae

Choi Dae-chul

Heo Seong-tae

Kim Kang-hyun

Kim Min-gyu