I would like to start off by saying this manga is one of the most original works of horror I've ever encountered. I expected it to have at least a 7.5 rating. I know most are not fans of horror, and if they are they are very critical. But there's not much to be critical about here. I would say, contrary to others, this manga has very good pacing. I always wanted to turn to the next page and see what strange things might happen next. The art is beautifully grotesque, the settings are nerve-racking, and the characters are interesting enough, likable enough for you to be concerned about them in this suddenly inflicted hellscape. Deaths and tragic events do not come off as just for pure shock-factor, instead, each death drives the plot in its intended direction. There's no filler or unnecessary dialogue here. Every page is dedicated to making you feel uneasy and suspenseful through the motions the characters go through.
The story itself, in my opinion, has a great resolution. It feels right, and leaves the reader satisfied. The events leading up to it feel right. I didn't look back and think there were any glaring plot holes. There's twists and turns that keep you interested. The art is unique and amazing. If you like horror, or you're just getting into it, I would definitely recommend this manga!