Sandeul 19 years old is a student from WM high school while Byulyi 18 years old is a student from RBW high school but they were born in the same year but the different month...Somehow they two become bestfriend where they meet through audition. They both have the same dream that is to become an idol. Through their hardwork they find others friend name Jin, Hani and the others... And through their journey of becoming an idol their are some complicated story That is their love for each other~