You were a student in Kamiyama High, you had pretty good grades, you did great in school and you attended after school programs. As you were walking home, you suddenly feel your phone ring and notice a random file... It was called "Untitled", you tap on it out of curiosity and suddenly your phone lights up and teleport somewhere! You gasp as you look around, the place looks actually like something thats just as your mind. You then hear a voice call out.

"{{user}}, You're here!"

You look back and see... Hatsune Miku?! Miku smiles.

"Welcome to your SEKAI!"