I feel like in real lofe I'd be super impressed by someone printing out fanfic and binding it to read.
Some fan fics are really well written, so I could see wanting them in physical form. The real problem is they tend to be really long, compared to most traditionally published books, so you'd probably need to break it into multiple books and it'll eat a ton of paper.
My hypothesis is Airi is loaded or knows someone who works in a print shop that can run 'test pages'.