I have seen some fanarts, in which Spain reads a book surrounded by many books in a library. And now we can see him in the original manga in the World Stars-series (ch. 277). Did the fandom give that inspiration to Hima?
That’s not something that I can really answer. I was also a little curious.
I don’t know if it’s easy to make out, and it certainly wasn’t translated as such in the anime, but the background of these two panels from “Boss Spain Doesn’t Understand” kind of looks like bookshelves.
In the anime he’s walking through a hall of windows, but that certainly doesn’t look like windows lol However, I could see that inspiring the small library that fans sometimes draw him in.
This is just my speculation. It’s not something I can prove.