Luhan is the defination off crazyness, he is a famous designer and he has different kind of habits,everyone around him live a strange life.  The boy just trust in a few people and the one is his secretary, Yuri, a caring person, that had a beautiful boyfriend, Minho. One day, luhan calls her saying that he finally find the model of his new line, the one that would fit all off his clothes. What would be her reaction when she finds out that the girl he choosened was her little sister?