Hyorin is a super nosey and protective best friend. When Bora, said best friend, begins to smile around a boy whom she can't stand, she finds herself investigating why. The mystery of 'why' leads her to some awkward and totally avoidable troubles; all thanks to Taeyang a stupid boy she thinks her best friend is in love with. And a boy who is way too prideful (at least, that's what she thinks).