Kim Seokyoon Director Kim Myung-min Detective K Actor Oh Dal-su Han Seo-pil Actor Lee Yeon-hee Hisako Actor Jo Kwan-woo Musician Jo Actor Jung Won-jung Senior colleague Actor Hwang Jeong-min Sakura Actor Hwang Chae-won Do-hae Actor Woo Hyun Mr. Bang Actor Choi Moo-sung Boss Actor Kim Soo-jin Screenwriter Lee Nam-gyu Screenwriter Jang Nam-cheol Cinematographer Kim Hanjo Music