An excelent premise, good firsts volumes, but sadly, a poorly executed work and lots of wasted potential.
Welcome to the NHK is one of my favorite anime of all time, so i checked out the manga to see what it was like and... it was VERY dissapointing.
Leaving my expectations besides, the story and character arcs in this Manga are very poor. Both the Story and the Characters go in circles for WAY too long. You get angry at them because you don't feel any sort of progression in the story whatsoever.
None of them has any sort of real resolution or redeemable qualities at all! They end up being very annoying to read. Characters keep showing up, but they have nothing to say, and end up being pointless to the plot and message.
The fact that they don't progress or go in circles is used in the anime in a more meaningful way of "Don't give up, keep up on trying", but it's not the case in this manga. So it ends up just being repetitive and stretched out
The message and main point of the story gets completely lost, and by half of the manga you keep asking yourself "Where is this going for? What's the point to all of this?". And none of that gets resolved in a satisfactory way.
Not only because it's not well focused and executed, but also because the pacing is very bad. Super rushed or super slow, both in the wrong places.
In general, this manga keeps going in circles, offers no clear resolution to any character arc, and ends up feeling empty and wasted. I would suggest just checking out the Anime adaptation instead, which fixes and upgrades every single aspect of this Work. Very dissapointing work.