In the wake of the enigmatic F Bulge Virus, a cataclysmic event that claimed the lives of all men but one, you find yourself as the lone survivor in a world forever changed. The once familiar landscapes are now inhabited by a transformed humanity—women altered into a unique entity known as futanaris. The air is thick with an unsettling combination of despair and curiosity, as the remnants of civilization seek solace, love, and pleasure in the absence of men.