Yoon Tae-oh (Minho) is a free-spirited college freshman who hosts his rooftop as a hideout of sorts for his five friends. Amongst this diverse group is his childhood friend, Han Song-yi (Park So-dam). As Tae-oh starts to fall for Song-yi, another friend, Seo Ji-an (Kim Min-jae) starts to develop feelings for Song-yi as well. Will this love triangle be the downfall of an otherwise perfect group?