When I finished, I thought, "That was pretty good." But then I thought about it.. I didn't actually enjoy it for the most part. It was the last few chapters that I enjoyed, but most of it I was gliding through.
The characters were okay, and the gore was well done. The concept wasn't bad either, to be honest. I just felt like I was waiting for it to end rather than actually feeling excited about it ending. Koyori and Misa were good enough to make the read not feel completely worthless.
6/10 Would I recommend this? Eh... It's a short read and might be an okay time killer, but there is far better to read elsewhere. The conclusion is the best part, but reading 18 chapters to experience it is time that could be used on a better series.