The game telling me to stop just makes me want to play it even more. Someone in universe doesn't want us digging further.
This thing about "not implemented yet" is definitely illusion of choice, something the game pulls off extremely well. However, I do thing we have reason to worry, not because of that illusion, but because of unrelated happenings in recent updates. This isn't going to just be an 'oh, you get a choice, but it is meaningless and nothing will come of the only valid option' moment, I think it is indeed setting up for something and not something good.
I'm still not convinced this was another 'Yumi kiss' moment.
As for the letters, yeah, I'm with you there. We thought we had something and now it seems less like a sure thing. This is typical for theories here, but we'll see what's going on with these letters eventually.
Yeah, this isn't even into the real dark part yet, so I don't think this is the worst we'll see. I just went over that event again before your original comment and it doesn't seem so imagined anymore. I used to think the same, but now I am unsure and erring on the side of it being real.
Not even close, this is going to be in development for multiple years as confirmed by Selebus.
This game is NOT making things easy on us, is it.
Either way, we will probably see some form of consequence whether it's the wrath of Noriko or upsetting Chika, or worse, Yumi.