"Kurogane Communication" is a 12-episode anime series set in a post-apocalyptic world where humanity has been nearly eradicated by a catastrophic event. The story centers on Haruka, a young girl who is one of the last surviving humans. She lives in isolation, accompanied by a group of sentient robots who act as her caretakers and companions. These robots, each with distinct personalities and functions, include the protective and fatherly Leader, the cheerful and energetic Gun, the calm and intelligent Tank, the shy and observant Recon, and the nurturing and motherly Nurse.

The narrative explores Haruka's daily life as she navigates the challenges of survival in a desolate world, relying on the robots for companionship and support. The robots, despite their mechanical nature, exhibit human-like emotions and form a close-knit family unit with Haruka. Their interactions highlight themes of loyalty, resilience, and the blurred line between humanity and artificial intelligence.

As the series progresses, Haruka and the robots encounter remnants of the old world, including abandoned technology and occasional threats from malfunctioning machines. These encounters prompt introspection about the nature of humanity, the consequences of technological advancement, and the enduring bonds that transcend biological and mechanical differences. The story maintains a balance between lighthearted moments and poignant reflections, offering a nuanced portrayal of survival and connection in a world devoid of human life.