Sinb is such a badass. Everyone bow down to her except for one...   *Might contain a lot of profanities

Sowon, Yerin, Eunha, SinB, and Umji are projected to be next idol group in Korea. They are one of the best trainee in the industry and looks like soon to be debuted. But what if one person makes everything goes beyond their imagination? That, one last addition of the member makes everything complicated? What will you do if you have to choose between two things that you love the most?