(y/n) (l/n), a beautiful young woman at the age of 19, thought she couldn't be happier. She was working for her best friends, which were also known as Vocaloids by everyone. And on top of that, she had a relationship with the famous Kagamine Len. Yes, life was wonderful and everything just went perfect for her. Too perfect. One day, however, the one, she loved so dearly, made a big mistake and suddenly her perfect world was breaking into million of pieces.