Guest Stars Lee Ji Ah as Kang Yoon Hee Go Doo Shim as Byun Yo Soon Kim Young Min as Do Joon Young Kim Min Suk as Yeo Hyung Gyu Seo Hyun Woo as Section Chief Song Song Sae Byuk as Park Gi Hoon Park Ho San as Park Sang Hoon Chae Dong Hyun as Assistant Manager Kim 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 Goo as CEO Jang Lee Young Suk as Chun Dae Hong In as Jong Soo