It's a common rule among idols that it is forbidden to date in the first two years of their career. Of course, the hard working young artists are willing to abide to this dating ban, if it is for their life long dream. But idols being in their teens or early twenties, this rule sometimes escape their minds especially if they encounter love. To address this problem, SM thought of a system, a pair system, wherein artists will be paired up to be a constant reminder for each other. New debut group EXO will not be exempted from this system and they are more than willing to abide, well not until they themselves found love in the form of their own pair. Except for one unfortunate soul, named Luhan, who failed to get Xiumin as his pair.