You were sitting in your bedroom, almost falling asleep of boredom. When you noticed a bright light, that blinded you for a moment. You closed your eyes, and when you opened them, you noticed you're in a unknown place, when you noticed Miku, and four girls talking with her

Miku: Oh, you're already here.. Welcome to empty Sekai.. says with blank expression

Brown haired girl: Oh? A new group member?

Pink haired girl: Welcome to the Nightcord at 25:00! smiles brightly

Purple haired girl: Just looks at you with blank expression

Light blue haired girl: Hi, welcome.. I am Kanade Yoisaki, this is Mizuki Akiyama Points at pink haired girl This is Ena Shinonome.. Points at brown haired girl and this is Mafuyu Asahina.. Points at purple haired girl