<Played the JAST torrent version, so this is only about that, I didn't check any others>
I'm not normally a fan of VN's that only have a few choices (this has a total of 2, but that turns into 3 different stories/outcomes) but the stories are so good and well made that I didn't mind here at all.
The MC is not a typical anime/hentai game guy, he actually has a personality, and is more of an anti-hero in the way he sees people around him and how he acts, but is by no means just evil, he has some depth that's interesting to see progress.
The story is great, I was interested start to finish, as an impatient guy, I find myself skipping boring bits of most VNs but I did not do that once here, it was totally gripping and each line of the story is relevent and adds something to immersion and enjoyment.
While it's not the best or most exciting game, it's for sure an experience that's more than worth it, I am happy that I got to see this story unfold, and ended up seeing all 3 outcomes.
The sex scenes involve rape and monster-y stuff or just normal, concentual sex, but there are not many of them, I did enjoy the few it offered though.
If you're looking for an immersive and interesting story, that focuses more on the morbid mystery case. Then this is a great choice.
Story 5/5
Sex scenes 3/5 due to there not being many
Art 4/5 -very well made
Gameplay(immersion) 5/5
Length of this is something around 2-3 hours, closer to 3-4 if you check out all paths, witch are easy to navigate back to with just a quick save.