Guest Stars Kim Jin Yup as Kim Yoo Chan Lee Chang Wook as Senior Colleague Choi Dae Chul as House Owner Han Jae Yi as Lee Joo Yun Ji Soo Won as Choi Shin Hye Seo Hyun Chul as Jo Hyun Suk Yoon Yoo Sun as Song Hyun Ok Lee Joo Young as Jo Soo Ah Lee Jung Yul as Kim Il Sun