I've just finished watching Shinsekai Yori and wow, it's a perfect anime. One of the best I've ever seen. 10/10 without a doubt.
Y'all should watch it (knowing as less as possible beforehand). It start slow and you don't get anything, but it keeps getting bigger and better.
You'll love it if you like mystery, horror and supernatural animes. And there's a moment around chapter 6 or 7 that most of you will enjoy.
Really go watch it fat!