Amidst the glitter of neon lights, due to technological progress, people are consumed by the convenience of commerce. In the shadows, a war begins to unfold between the Yatagarasu and the Phantom Society, and the Devil Summoners harness the otherworldly power of the 'Demons'.

Existing in humanity's sea of ​​data, a digital consciousness has evolved into a sense: its name is Aion. Observing humanity from afar, Aion calculates that a world-destroying catastrophe is inevitable and creates two agents to fight it: Ringo and Figue.

Aion's agents must work together to investigate and prevent the butterfly effect that would lead to the destruction of the world.

- Investigate the end of the world as Ringo, an agent of Aion, tasked with saving humanity from an apocalypse.
- Explore a supernatural RPG with stylish summoners and dark dangers lurking beneath the neon lights of cyberpunk Japan.
- Collect demons and unlock fusion combinations to create new, more powerful demons and use their deadly abilities to defeat your enemies.
- Strengthen the bond with your teammates and look deep into their souls, allowing you to relive their latest adventure and discover the truth about their story and yours.