Kwon Sang-woo as Kay

Lee Bo-young as Cream

Lee Beom-soo as Cha Joo-hwan

Jung Ae-yeun as Je-na

Lee Han-wi as President Kim

Jong-hak Choi as Engineer

Wung-hoe Gu as Young Kay

Im Cheol-hyung as Cat Girl's Song-writer

Eun-ran Jo as Min-cheol's Wife

Myeongsin Kim as Kay's Birth Mother

Kyeong-seon Kim as Wedding Manager

Ha-jin Lee as Japanese Rocker

Nam Gyu-ri as Cat Girl

Lee Seung-chul as Singer A

Jeong Jun-ho as President Lim