Reborn as Medeia Vega after the demon king's betrayal, a demon queen awakens in an apocalyptic world forever transformed by cosmic radiation. Humanity fractures into two: those whose minds shattered into monstrous shells, and the hardened survivors who fight endlessly for existence. The system's decree is simple—find a kind-hearted husband and unlock salvation. Yet Medeia discovers her destiny demands more: building a sanctuary where survivors can reclaim their humanity. Between monster hunts and sanctuary walls, she searches for the man destined to stand beside her. But the system has other plans for her journey. Every curse word triggers penalties. Every loss of composure threatens her mission. As Medeia battles cosmic horrors and her own volatile nature, she learns that finding love in the apocalypse requires mastering the one thing she never could—herself. Will she survive long enough to find her soulmate, or will her sharp tongue doom her before she even begins?