Kim Ji Eun is a student who studied in the same school as Kim Junsu (2PM) and Alexander Lee. But Ji Eun and Xander arent congenial with each other. They're always throwing tantrum, fighting, yelling and cursing to each other. She has a slight crush on Junsu but Junsu only treats her like one of his friends. To be told Junsu is besfriend with Xander and he's the one who always soothed those two down. 

Junsu somehow can't stand anymore seeing both of his friends get into a fight like that and he tried to hook them up by planning something. Junsu planned that both of them need to be in a fake relationship for 2 months and he's expecting that both of them will start to act nice towards each other after 2 months.