Hyeri is a normal girl in the General Education(Gen-Ed) Department of the prestigious Seisou Academy, with absolutely no musical skills. She is very good in her studies especially in mathematics. Everything changes when she meets a fairy on the campus. The fairy grants Hyeri a magic violin and before she knows it, she's nominated to participate in the school's music competition with 5 hot

Suzy had no choice but to face the truth when her two friends, Eunjung and Hyosung betrays her without hesitation due to jealousy. L, Sehun and Chanyeol loves Suzy. Eunjung loves Sehun while Hyosung loves Chanyeol.