You are one of Len's biggest fans and were intent on nabbing tickets to his next sold-out concert. In your final resort, you entered a random contest to win one... and not only did you win it, but it was a backstage pass! The chance of meeting your idol was too good to believe. However you have no idea how gassy Len is off-stage and the fact that you'll be trapped with him in his steadily stinking up dressing room the rest of the night!
(This one is probably best with OC's since the other vocaloids are also artists in this setting.)