The youth are nurtured by robots in a safe enclosure resembling a nursery, where the facade of tranquility conceals their innate potential and inquisitiveness. This haven seems akin to an idyllic utopia, while the external realm is an inferno, bereft of machinery and infested with powerful, enigmatic supernatural entities. Kiruko and Maru team up to explore the ruined remnants of Tokyo in search of paradise, yet their quest seems increasingly futile as they struggle to locate a land that may only exist as an unattainable fantasy.