Guest Stars Lee Ji Ah as Kang Yoon Hee Go Doo Shim as Byun Yo Soon Kim Min Suk as Yeo Hyung Gyu Chae Dong Hyun as Assistant Manager Kim Seo Hyun Woo as Section Chief Song Song Sae Byuk as Park Gi Hoon Kim Young Min as Do Joon Young Park Ho San as Park Sang Hoon Jang Ki Yong as Lee Gwang Il Jung Jae Sung as Yoon Sang Tae Jun Gook Hwan as Executive Director Wang Ryu Abel as Jung Chae Ryung Son Sook as Lee Bong Ae Ahn Seung Kyun as Song Ki Bum Jung Hae Kyun as Park Dong Woon Shin Dam Soo as Jung Chang Mo Lee Young Suk as Chun Dae Jung Young Joo as Jo Ae Ryun