Main Characters Ahn Do Hoon 16 main appearances Kang Yoo Jung 16 main appearances Shin Se Yun 16 main appearances Jo Min Hyuk 16 main appearances Dan Bal Kang Woo Chul Ahn In Hwan Jo Han Il Park Gye Ok Park Hyun Suk Hong In Joo Seo Ji Hee Choi Kwang Min Choi Kwang Soo