
Can someone explain it to me, please?

From what I've guessed the Nugubechi are shape-shifters and can impersonate humans and presumably other species. I think the part where Yume is reading a book is one of the insects impersonating her, because right after being asked about the books, Yume says she didn't touch them.
Their modus operandi is probably whipping species into a murderous frenzy which causes them to attack others, which is what the page at the end is supposed to signify. I don't think they actually kill the people they're impersonating though, the scientist is still narrating at the end even after they get him.
The fungus at the beginning was trying to prevent the Nugubechi from maturing or leaving the park which is also why the park goers were so adamant about keeping the Nugubechi in the park.

Yo, you can really tell the young ones on this site based on the comments.
I appreciate y’all

Lmfaooo the Free community was wild but I find that these days people feel the need to excessively STRESS their distaste for anything tinkering on the grey area of the moral scale. Almost as if they feel like the public is judging them if they don’t. (Or as if they’re trying to convince themselves that they have pure thoughts)
So if someone can tell me what is going on with the cassette being ejected and what it means, I would really appreciate it. (*꒦⌓꒦)
for what I remembered, if a player inserted the cassette the game will be saved. And if an NPC inserted the cassette they'll be aware of the simulation (but I'm not so sure with the latter)
and recently a new cassette appeared so it means a new story will be played
Ooohh, so the dad joke character might be an NPC that used the tape that uke found?
yeah, in the previous chapter he accidentally loaded the tape so his character became aware but as stated in the previous chapter the glasses guy might be the one who's behind it