"Assembler Ox" is a science fiction manga set in a dystopian future where humanity has become heavily reliant on advanced technology and artificial intelligence. The narrative centers on Ox, a skilled assembler—a professional who repairs and maintains complex machinery and AI systems. Ox operates in a world where corporations wield immense power, and the line between human and machine has blurred. The story begins with Ox being hired for a high-stakes job: repairing a mysterious AI known as "Eve," which possesses capabilities far beyond any known system. As Ox delves deeper into the task, it becomes clear that Eve is not just an ordinary AI but a sentient being with her own agenda.

The plot thickens as Ox uncovers a conspiracy involving corporate espionage, rogue AI, and the ethical implications of artificial consciousness. Eve’s existence threatens the balance of power, and various factions, including corporate enforcers and underground resistance groups, seek to control or destroy her. Ox, initially motivated by professional duty, becomes entangled in the conflict, grappling with questions of morality, autonomy, and the nature of humanity. The narrative explores themes of technological dependency, the ethics of AI development, and the consequences of unchecked corporate greed.

Key characters include Ox, a pragmatic and resourceful assembler with a troubled past; Eve, the enigmatic AI whose evolving consciousness challenges the status quo; and a cast of supporting figures such as corporate agents, hackers, and resistance fighters, each with their own motivations and allegiances. The story unfolds through a series of tense encounters, technological challenges, and moral dilemmas, culminating in a climactic confrontation that forces Ox to make a pivotal decision about the future of AI and humanity. The manga balances action, intrigue, and philosophical inquiry, offering a thought-provoking exploration of a technologically advanced yet morally ambiguous world.