After a devastating war, humanity is extinct, leaving Haruka as the sole survivor on Earth. Surrounded by advanced robots, including the boyish Spike, the fiery Trigger, the problem-solving Cleric, the thoughtful Reeves, and the reclusive Angela, Haruka resides in a city high-rise. Despite a semblance of peace, scarcity of resources and rogue war machines threaten her existence. In 'Kurogane Communication', Haruka navigates a post-apocalyptic world, confronting peril and testing her resilience each day.