The future is bleak and urbanized. A government super-power holds the keys to all the doors. Hope lies in a secret organization who kidnaps "gifted" children and teaches them to wield their ability to view the life energy of all living things. A young girl befriends a sempai, a street rat comes to rescue her, and two parents wait helplessly to see their daughter one last time... (Source: AniDB)

When highly evolved AIs set out to eradicate mankind, the carnage that ensues fills the air with the stench of fresh blood and burning bodies. In a desperate bid to prevent the calamity from ever occurring, a scientist bets everything on a remnant from the past. Turning the clock back a hundred years, AIs are already an integral part of human society, programmed with specific missions meant to be carried out for their entire course of operation. Vivy, the first ever autonomous AI, is a songstress tasked with spreading happiness through her voice. In a theme park where she hardly ever gets a proper audience, she strives to pour her heart out into her performances, bound to repeat it day after day—that is, until an advanced AI from the future appears before her and enlists her help in stopping a devastating war a hundred years in the making. With no time to process the revelation that flips her world upside down, Vivy is catapulted into a century-long journey to avert the violent history yet to come. [Written by MAL Rewrite]

A Continuation of the original Dagwon Series. Peace is restored and the original cast return to their normal life. The sudden appearance of a new mysterious boy that appeared and was chase by no other than their own ally from the past demanding the Dagwon crew to turn the boy in. The dead from the past also make an appearance in this OVA. So the new adventure and excitement begin a new.

Recap of all 13 episodes of Vivy: Fluorite Eye's Song.