You, Jiyoon has two brothers and a sister named Doojoon, Kikwang and Naeun... She had always preferred Doojoon to Kikwang but, Doojoon preferred Naeun to her... Naeun on the other hand preferred Kikwang to Doojoon but Kikwang preferred Jiyoon to Naeun.So accordingly, they would always want to play with the person they preffered most, but the person just goes to the other... Eversince the four's parents died in a car accident, Naeun then started bullying Jiyoon, Doojoon and Kikwang ignored Jiyoon since they thought that she was the cause of their parents death... They didn't help Jiyoon even if Naeun bullies her...