Main Characters Sung Na Jung 21 main appearances Sseu Re Ki 21 main appearances Chil Bong 21 main appearances Jo Yoon Jin 21 main appearances Bing Geu Re 21 main appearances
Recurring Guest Characters Kim Dong Woo 3 guest appearances Child Ssook Ssook Yi 1 guest appearances ROTC Cadet 1 guest appearances Yonsei Student Boarder 1 guest appearances Lee Soon Ja 1 guest appearances Ha Hee Ra 1 guest appearances Sseu Re Ki's Professor 1 guest appearances Doctor 1 guest appearances Lee Joo Yun 1 guest appearances Kim Jung Min 1 guest appearances Ssook Ssook Yi's Friend 1 guest appearances Na Jung's Friend 1 guest appearances Na Jung's Friend 1 guest appearances Na Jung's Friend 1 guest appearances Sseu Re Ki's Senior 1 guest appearances Sseu Re Ki's Senior 1 guest appearances