"I need you to do me a favor." -Jimin
"Why should I? O.o" -Eunji
"If you don't then I'll tell everyone your secret."
Jung Eunji, sister of Jung hoseok, has gotten herself into trouble. She has to be Jimin's (the bad-boy yet one of hoseok's friend) 'fake' girlfriend because he wants to get back with Yumi(Jimin's ex.) If she does not listen to him, Jimin will tell everyone that she is the sister of Hoseok and also a stalker of Taehyung. How would Eunji deal with him? Will their feelings change throughout the process?