Main Characters Koo Kyung Yi 12 main appearances Song Yi Kyung 12 main appearances Na Je Hee 12 main appearances Han Kwang Wook 12 main appearances Oh Kyung Soo 12 main appearances Director Yong 11 main appearances Gun Wook 11 main appearances
Recurring Guest Characters Department Head Kim 10 guest appearances Na Jong Jun 9 guest appearances Lee Dae Ho 8 guest appearances Heo Hyun Tae 6 guest appearances Jung Jeong Yeon 6 guest appearances Heo Seong Tae 6 guest appearances Jung Yun's Colleague 1 guest appearances