I really can't say I cared for the "What if Akane also bad?" ending vibes, and reading the additional context from the novel I guess I'm simultaneously kind of happy that the original ending didn't lean in that direction, but that I also really don't think that this story would've benefited from an 11th hour exposition dump about the precise biological mechanisms underpinning the parasite insect oni reproductive system.
On the whole I'd say I liked this, but mostly on the merits of the first third or so. The first chapters have got some great setup and establish the atmosphere and the main plot hook, and give some strong hints of the recurring theme of pregnancy and motherhood (or a traumatic lack thereof) as sources of horror. Chapter 3 in particular has some great execution with the lead-in of having the relatable real-life horror experience of the dreaded Intensely Uncomfortable Job Interview with the added creepy vibes of having this happen in flashback form so you know that the ostensible high point of her discovering that she actually landed the job is actually going to end in her being the live-in caretaker of a bug-infested corpse in a creepy mansion on a mountain in the boonies.
But in retrospect the high point of the series I'd say is really chapter 6: it's focused on Akane's backstory and inner turmoil, while simultaneously covering the largest variety of geographic locales of any chapter. It starts in the mansion, moves into the courtyard, takes us on a drive down the mountain and into town, through the checkout line of the grocery store, and back the way we came to the mansion again while detouring into a jaunt into Akane's past to establish her unresolved feelings about her miscarriage and the ensuing shunning at her job as a nurse as a result of her (unknowing) affair with a married co-worker. It also demonstrates a degree of canniness on her part, with her subtly nudging the situation in a direction where Hikita entrusts the money to her as a way of testing the truthfulness of the story Kumakawa told her. In a fairly short span of time we've demonstrated her ability and willingness to assert agency in her intensely weird situation and we've added social isolation (via being shunned by her former nurse co-workers and being unable to form a connection with her new co-workers) and emotional isolation (courtesy of her inability to discuss her miscarriage with anyone) to the pre-established physical isolation brought on by the fact that she's living in a super sketchy mansion on a mountain with a presumed corpse, a couple of sketchy fellow caretakers, a mute child, and a bunch of bugs. Oh, and also this escaped missing hiker dude, here he is in a sequence of three panels being visible to the reader while Akane enters the room with him, and then a final panel of her noticing him. Page 36 of chapter 6 is a fantastic piece of sequential art. Top tier, no further commentary.
Yeah, so, I started off kinda ambivalent about this ending, but over the course of reviewing the early chapters I talked myself into disliking it with some intensity. If the strongest part of your narrative is when you make the protagonist of your horror story easy to both empathize with and root for then your full page panel of her in silhouette making crazy eyes in the final chapter is always doomed to fall flat.
Anyway, all bloviating aside, many thanks for translating this. It really was an enjoyable horror manga, all of my overly-verbose criticism of the ending notwithstanding.