In NiaLand, Japan's largest theme park, there is an AI named Vivy who performs as a cast member and brings happiness to her audience through singing. In this society, AIs have become essential for human life and serve specific purposes. One day, without warning, an AI from the future appears, stating that in one hundred years, advanced AIs will turn against humans, leading to war and the destruction of humankind. When he requests her assistance in preventing this catastrophe, Vivy decides to abandon her role on stage and embark on a mission that will last for a century in order to safeguard humanity.
Vivy Prototype was published digitally in English by Seven Seas Entertainment under the Airship imprint from July 7, 2022 to May 18, 2023, and in print from October 25, 2022 to June 13, 2023.