Idol's love [Diabolik lovers Fanfic] (Mukami Kou X Reader)

You are a very famous idol, that is known throughout the world. Your busy schedule is packed everyday. Your manager suddenly calls you to tell you that you had to attend Night School. But what if you meet your all-time rival in that school? Mukami Kou. And How would you deal with your fans and haters in that school...