The anime has an interesting premise, Japanese folklore related to urban legends and horror legends is great and quite different from most other cultures, so much so that we see it being used in several different ways in works of all kinds, so it would not be a bad idea to create a work focused only on that, but the anime explores very poorly its base structure.
Sorao is a lonely girl who doesn't have much to lose in the world so isolates herself in this place that the characters call "another world", but at random she ends up meeting the person who would be his partner from then on, Toriko, a girl a little more experienced in that world who exploits him to find a lost friend.
From the moment Sorao forces himself to follow Toriko around the world the anime gives indications that those conflicts with monsters only have 3 objectives, create interesting suspense and action scenes, develop Sorao's personality for her to mature and a turn in her life through the relationship with Toriko and solve the mystery of the missing girl.
But none of the three premises are successfully fulfilled, the anime fails to create empathy for the main character since most of the time exchanges interesting dialogues with jokes or interruptions for something that happened in the background, the most we know of it are monologues that she does about her person, but we have almost no moments of personal improvement of the character.
The action scenes are mediocre and mostly anti-climatic, and the main mystery is most often interrupted by an isolated mission that takes the characters nowhere.
In the end what held me in the anime was its world, which by the way seems to be very rich and full of complex rules to survive in it, but in very few episodes these same rules end up being deconstructed by the whims of the script and conveniences, if the anime were only paranormal research as its basic premise I would not bother since its closed missions are at least interesting that give a reasonable level of entertainment , but become a problem in the middle of twelve episodes since, upon arriving at the end of the anime it seems that we have just begun the journey and nothing relevant has been done so far!