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This is the story of how I (Vivi) destroys I (AI). Along with the development of science, Vivi, called 『 Utahime 』, has become an indispensable part of the life of mankind. It is also an AI that continues to sing at 『 Nia Land 』, one of the largest theme parks in Japan. Her singing voice fascinated people and created daily enthusiasm. What suddenly appeared to her was an unknown AI called Matsumoto. Matsumoto says he came from the future 100 years from now, and asks Vivi to cooperate with 『 singularity Project 』 in order to stop the final war between mankind and AI. The oldest Utahime AI created for singing and the future AI created to stop the destruction of mankind. Here's the story of AI that takes 100 years.