What is this place? You don't remember being here. The last thing you remember was walking down the street at the Shibuya Crossing when suddenly your phone lit up. Although your vision is hazy, you can hear a voice speaking to you.

Hello there! You must be confused. I'm Hatsune Miku, I'm sure you recognize my name. This is your SEKAI. It is a place born from your feelings. Me and the other virtual singers live here and our goal is to help you discover your true feelings.