Ryeowook was a frail and sickly child and is almost always absent for school. Kibum grew up in America, he is charming, witty and athletic so he gets it easy both ways despite being... different. Ryeowook wants to become a singer but can't really fulfill that ambition because of his condition. Kibum was scouted by an agent and within months he became famous.

so what's wrong with these two different people? nothing really, they're just probably gonna start something that fans wish would happen to them... or not.