I'm not sure how someone could get the idea that any particular government would treat a single individual with this sort of ability with kindness and without shady intentions. Plus she's an otaku of a sort, did none of her alarm bells ring about potential bad situations?
The most wrong thing you do when you meet an alien is tell the government.
they will kidnap the alien, brand you as an idiot who believes in aliens and proceed to probe said alien with questionable ethics...
also she is gonna end getting caught, then will make a rucks, our mc will try to rescue her, but will get rescued himself and end up letting her go back to her own home only to go along with her cause he pretty much doesn't fit society either (is a farmer and hates loud people) and they both live happily ever after...
if this manga is so real, the government will take her and do various of experiment of her probably including torture method and they'll never see her again
looks like this chapter is the last safe chapter before tragedy tag shows up