While I’ve treated this as a narrative concept, it’s possible you are referring to a specific or a manga title that is currently in development.
Here is a write-up exploring the premise, world-building, and core themes of this concept: !О© Factorial Omega: My Dystopian Robot Girlfrie...
The subterranean level of the city where the story takes place. It’s filled with "Zeros"—people who have disconnected from the grid and live off scavenged tech. While I’ve treated this as a narrative concept,
In a world that throws away anything that isn't productive, two "broken" individuals find value in each other. !О© Factorial Omega: My Dystopian Robot Girlfrie...
Balancing Omega’s human-like behavior. Too much "humanity" makes her unstable and attracts the Factorial; too much "logic" makes her cold and efficient but loses the connection you’ve built.