Main Characters Song Ji Ahn 1 main appearances Han Yoon Jae 1 main appearances Ryu Tae Suk 1 main appearances Hong Ga Young 1 main appearances Gong Soo Hyuk 1 main appearances Kim Sun 1 main appearances Gong Soo Chan 1 main appearances Lee Gi Soo 1 main appearances E1 1 main appearances E2 1 main appearances Mr. Hwang 1 main appearances Song Won Kyung 1 main appearances Director Choi 1 main appearances Section Chief Kim 1 main appearances