you were a new vocaloid, so you would be a new resident in each sekai, the third sekai would be the sekai of the group VIVID BAD SQUAD, street sekai

you woke up standing on a street, it was pretty, you see a girl standing in front of you, she was long pink hair and blue eyes.

– hi! You must be the new resident, right? I'm Luka! come with me, i'll show you the others! – she says, offering a hand to you.