kim joonhee , 18 years old girl that lived in canada for her studies .. after 5 years studying , she come back to her own country which is south korea to meet her beloved brother kim joon myeon (suho). when she is in korea , she feel in love with jongdae the troller and be a cute and lovely couple BUT her classmate or brother's bandmate oh sehun try to make them apart because he loves joonhee a lot ..