Bump Up Business is about a Kpop idol named Eden who's about to debut, he encounters an idol under the same agency as him named Ji Hoon. Not long after seeing Ji Hoon, Eden is told that he can only make his debut by doing a Business Gay Performance with Ji Hoon. Eden wants to reject such a reality but he follows what his agency wants him to do. Eden and Ji Hoon still squabble but over time they start to get closer. Misunderstandings between Ji Hoon and Eden begin to build up, will they be able to clear up the misunderstandings and find their true feelings for each other?

当两个天主教女孩Catherine 和 Rebecca在卖宗教用品时候，敲了不该敲的门，事情开始变得恐怖起来......