Ryoo Seung-wan Seokhwan Director, Actor, Screenwriter Park Seong-bin Seong-bin Actor Ryu Seung-beom Sang-hwan Actor Bae Jungsik Taehun Actor Kim Soo-hyeon Hyeon-su Actor Jung Jae-young Seong-bin's Big Brother Actor Ahn Kil-kang A Senior of Seok-hwan Actor Im Won-hee Detective Lee Actor Kim Seon-guk Producer Kim Dong-gyu Music Kim Seong-hyeon Music Song Chang-deok Music