Illu self-betrayed theory:

-there is no villager at all in the village
-MC is a maniac who has completely different memory to what he has done
-Puke chan has some brain problem, she has a sickness called OCD or something, it makes her dangerous when she goes out of control
-Koharun most likely has another personality, called B-koharun. B-koharun emailed to herself, and lived with the village before.
-Dahara is a cuck. Valka is a try hard. Mikage is a hahahaha. Speedstar can be the "hardest developed character" that producers mentioned. Also there should be some connection between Koharun and Mitsumune, they have 100% match in some test
-All the bearprint or animal stuffs have been prepared by B-Koharun
-All the hallucination works. You should read the episode 6 facts for more detail

Episode 1:
-Almost everything is accident
-Mitsumune took out his phone to see all Bkorahun plan
-Mitsumune gave Masaki a bad medicine that would affect her puke later on, making the driver easier to see hallucination
-Koharun took everyone to the village

Episode 2:
-The hallucination triggered driver, drag him in
-The hallucination triggered Masaki, (since she puked on the driver, the driver would take 70% of the drug, when she took 30%, so it affected her slowlier) making her seeing some one had just passed by

Episode 3:
-Yottsun tried to rape Masaki, Masaki got scared, hallucination triggered her, she fought back but ended up killing Yottsun
-Mitsumune helped Masaki dragging Yottsun into the trees, or some secret place only he and Masaki knew. Of course, he remembered nothing
-At midnight, Mitsu went out of the house, phoned B-koharun, told to release Jack and told him to join the dark side. Jack will only listen to the one he likes, a.k.a Mitsumune
-Jack went out of the prison, threw Yottsun into the river, making Mitsu looks innocent at that time, then Jack ran into the village with the map given
-Note that Mitsumune only told Masaki that he would help her hiding Yottsun corspe, not that he wanted her to join the dark side

Ep 4:
-Koharun, gave the forest group a 95% real map editted by B-Koharun
-Jack had been to the forest before, drawing an 8 on a tree. You can see he tried to make his appearance, not to kill Judgeness, but to scare the group so they would't notice the tree numbers anymore
-Driver geting illued by some cause, may be by food. He eats alone I think
-The tunnel is full of toxic that cause hallucination
-the point of all the thing this episode is making the casts think "There is no way out"

Ep 5:
-80% of talking, then divine justice, nothing special about that
-Masaki stalking all along, nothing special too, may have burned some drug to cause hallucination
-Naana candy may be a normal one, but maniac Mitsumune might have switch the candy
-Lion did Lion thing, I don't know her role for now, may be she saw Mitsumune couldn't control his body fully

Ep 6:
-Smoke caused the 4 in justice group seeing their illusion
-Jack killed Mikage because he's an adult, but also he's the only one who doubted Koharun
-Koharun told everyone about Masaki in order to blame her. She's not on the dark group, after all. Also, all articles could be fake, since the only one who seems to know about this thing, Mikage, had died.
-Whether Mitsumune really kept running for 30 minutes or not is still a question. His true form, of course, saw that.

Culprit: Mitsumune, B-Koharun (different persona with Koharun), Jack (from episode 3)
may be Speedstar, need more clue
Misaki is pure, even though she killed Yottsun, she has nothing to do with the big plan
the motive of this big plan is still a question