Heliotrope Security Aoi is the name of a little girl. Only the little girl is actually a half-price neoplastic sex doll animated by an ancient artifact created by a post-singularity race from another universe. And the little girl lives in an alien cosmos herself, the universe of Pastel - a place of floating rectangular continents and endless sky. She has powers, too, only she doesn't know how or why. The question is -- can she save the universe? And which universe? A wild ride awaits...