Mini Chinese Mandarin lesson!
离开 means to leave or depart. In pinyin (Chinese phonetic spelling), 离开 is Líkāi.
It's evident that as of now Luhan is an inactive member of EXO, so the title is a spelling pun by me replacing the "Li" with "Lu" from Luhan.
Or it could be a ship of Luhan and Kai, but that wasn't what I intended.
(Branding companies, if you need anyone to come up with a name for your product please call me)