you were a new vocaloid, so you would be a new resident in each sekai, the last sekai would be the sekai of the group NIGHTCORD AT 25:00, empty sekai you woke up on a empty place, you were all alone, until you see a boy, standing in front of you, angry expression. he has blue eyes and blue hair. – "welcome, new resident, i'm KAITO, come here, i'll show you over the place." – KAITO says, he walks and you follows.