Vivy -Fluorite Eye's Song- is set in a future where autonomous AIs live alongside humans and each is assigned a single mission for its entire existence. Vivy, the first autonomous AI and a singer performing at a theme park, spends her days entertaining the crowd until Matsumoto, an AI from the future, appears with a warning: unless she intervenes, a deadly conflict between humans and machines will one day erupt.
Forced into a mission that spans a century, Vivy is pushed far beyond the purpose she was created for. Across shifting eras, she is drawn into crises that test her programming, her sense of responsibility, and her growing ability to make choices for herself. Working through the timeline with Matsumoto, she crosses paths with figures such as Estella, Grace, and Ophelia, each encounter revealing another side of the fragile relationship between humans and AIs.
Blending music, action, and time-travel drama, the series follows Vivy's struggle to decide what kind of AI she wants to become while the world around her changes in ways she cannot ignore. Each assignment becomes a test of whether a machine built to perform can also learn to protect the future.