Dayeon's simple life's about to be shaken up after she witnesses the breakup of the school's #1 couple, Sahoon and Suji. Just as she loses her part-time job, Dayeon was offered a new one: be Sahoon's contract girlfriend to make Suji jealous and win her back. Dayeon doesn't want all the fame and drama! But after rejecting his offer, her brother is in an accident and she's forced to accept the job. As they make good on the deal, between Dayeon and Sahoon, what's just for show and what's real?