Amidst the glimmer of neon lights, technological advancement causes humans to be consumed by commercial convenience. In the shadows, a war between the Yatagarasu and the Phantom Society is brewing, Devil Summoners who harness the otherworldly powers of “Demons”.

Existing in the secret sea of humanity’s data, a digital hivemind has evolved into sentience: Aion. Observing humankind from afar, Aion calculates that a world-ending disaster is imminent and creates two agents to combat against it: Ringo and Figue.

Together, these agents of Aion must investigate and prevent a butterfly effect that will lead to the end 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 under the neon lights of a cyberpunk Japan.
- Amass demons and unlock fusion combinations to create new, stronger demon allies, using their lethal abilities for incredible assaults on your foes.
- Strengthen the bonds with your teammates and dive deeper into their souls, reliving their last adventures and discovering the truth of their stories and yours.