导演:未知
主演:李泰彬 车柱完 吴民秀 车雄基
Oneday,a29-year-oldmantrapsasa19-year-oldyoungstudent,anextracharacterinsidethenovelthathis‘Sunbae(Senior)’waswritingandreceivesamission—tomakeChaYeonwoonhappywithin300days—otherwise,deathwillbehispenalty.Willhebeabletosurvive,toprotecthislovedonesandfulfillhismission