Yu-jin, a model student who dreamed of getting into medical school, lost her rhythm due to a brief relationship in high school and completely ruined her entrance exams. While she is studying to retake the exams, her delinquent ex-boyfriend, Jun-ha, appears before her again. Is he trying to sabotage her exams once more? Or does he genuinely still have lingering feelings for her? A sexy campus rom-com about two people who can’t help but be attracted to each other because they are so different.