Sam-dong Song (Gae Ttong)Geon-rak Park (Hee San)Park Gi-ryoong (Gae Ttong's father)Lee Eun-KyeongDae-han Ji (President Choi (Guest star))Lee Seol-goo (Head of working group)
Two people seem like non-identical twins, with both having having love lives going nowhere. Yet, Gae-Ddong suffers from a traumatic childhood experience and is introverted with low self-esteem. Meanwhile, his friend Changsoo is proud and boisterous. As Gae-Ddong finds happiness, troubles reoccur building to a final crescendo.