Kirin High School of Art has been taken over by Oz Entertainment because of financial bankruptcy. Oz Entertainment then transfers over its own idol stars to Kirin High to avoid a law requiring under age entertainers to study for a set time. Competition then brews between troubled students at Kirin High School of Art and then newly transfered idols from Oz Entertainment.
Shin Hae-Sung enters Kirin High School of Art with a high written exam score, but poor performance scores. She then meets fellow students Jin Yoo-Jin and JB, who makes her realize how fun music can be. Jin Yoo-Jin acted when he was a young child. Now, he is a troubled student dreaming of becoming a rock star. He attempts to cure his pain caused by his parent's divorce through music.