Main Characters Kim Do Jin 20 main appearances Seo Yi Soo 20 main appearances Choi Yoon 20 main appearances Im Tae San 20 main appearances Lee Jung Rok 20 main appearances Hong Se Ra 20 main appearances Park Min Sook 20 main appearances Im Me Ah Ri 20 main appearances Colin 20 main appearances Kim Dong Hyeop 20 main appearances