Kai, the son of the richest tycoon in Seoul, has went through thousands of maids which he hasn't hesitated to touch. But what happens when his father hires a butler for him instead? His new hired butler, Kyungsoo, has no tolerance for a spoiled rich boy. But Kyungsoo desperately needs the money to support his blind sister. Will having a male server change Kai's frivolous playboy ways? Will Kai be able to send his stubborn butler away? Or will Kai find himself slowly fall for his new butler?

Kaisoo! ^~^

http://www.asianfanfics.com/story/view/436141/young-master-butler--exo-kai-master-kyungsoo-kaisoo