Crossover This definitely seems like the outskirts...wait, is that another city, on wheels?

I throw an impurity out of my sight, for the city that houses it do not hold the tolerance to care for it no longer.

It went further than I had anticipated, however. Good, it truly is someone else's problem now.
-Zena, after the library's expulsion

An Arknights x Library of Ruina fic, I know, original