지진희
— Ji Sung-hee
양익준
— Hwang Dong-min
이문식
— Yoo Kwak
Kim Gyu-ri
— Yoo Young-shim
Kim Yeo-jin
— Shin Young-Shin
옥지영
— Kim Yang-sook
Jeong Woo-Hyeok
— Detective Agency team leader
Lee Eung-jae
— Older male cousin 2
이민웅
— Detective Agency 3
최정인
— Hong Geum-sun
Kim Tae-jeong
— Hotel President Park's wife