In the shimmer of futuristic neon lights, technological advances leads people to be ingested by commercial convenience. In the shadows, a war between the Yatagarasu and the phantom society brews together, demons summons who use the otherside forces of the "demons".. In the secret sea of human data, such a digital hibemind has evolved into a sensitive being: Aion. Aion observes humanity from a distance, calculating that a world-destroying disaster is imminent. To prevent the decline, Aion creates two agents: Ringo and Figue.
Together, these agents of Aion must investigate a butterfly effect and turn away the moment that will otherwise lead to the end of the world.