What if you wake up finding out that seven beautiful and mysterious boys have taken over not only your house but your life as well? Kim Jennie is a normal art student in Seoul who lives alone in a rooftop apartment her late mom had left her. Shownu, Wonho, Minhyuk, Kihyun, Hyungwon, Jooheon and Changkyun are seven aspiring idol trainees who came together from different parts of South Korea to reach for their dreams. Jennie was starting to get used to being alone and is actually ready to accept the fact that she's gonna' spend the rest of her life like that. But is she ready to meet the seven wonders who will basically make her realize that there is more to life than being on your own?