What's the story in episode 13 of Iaria?

There are many theories, all of which are guesses.

1, because of the fog, anyone who has read Japanese supernatural mystery novels knows that the mysterious fog in Japanese mountains has a mysterious role.

2. That child may have super powers, or look like a ghost or ghost. There is another saying that Snow White told A Jin that she would meet wolves, ghosts and ghosts. The wolf is the white wolf and gray pine that Ray appeased, the ghost is Vlad (vampires have the word "ghost" ...), and that ghost is the little boy. However, this may not be too big, because the ghost should be a distant mountain. Ginger thought she was dead, but she saw it again at the end of the twelfth episode (Jinjing is actually the distant mountain Jinyi mentioned in the novel). It turns out that the damn person is not dead, but a ghost. Also, episode 13 is actually OVA, and OVA has nothing to do with the actual plot.

From what nightmare they suffered when they entered the fog, they all entered the dream, only to find that they were all in the car after waking up.