That twist at the end was something nice, but overall this manga really sucks. If you really want to read it, just rush it, otherwise just don't read it.
It's alright, so-so gore, some decent creepy moments, nothing special though.
I'm not against bad ends, but it felt kinda bleh here. There was no good hope spot, it was just straight downhill. There was an attempted hope spot but it was so obviously fake. If there's no hope then it's hard to feel invested.