Kai and Lay is in relationship. yeah, they love each other, they spent many times togeteher, dancing togeteher, hang-out, cuddling,  singing. But what if Kai found out that Lay already have a FIANCE? Doesn't he will feel betrayed? And what if because of Kai, Lay got into a car accident and forget everything ABOUT KAI. How's their relationship can be? Will Kai sad? Regret? And how about Lay with his fiance? will they really engaged while Lay forget about kai?