What is this shit?! I don't even have words to describe how utterly bad is this manga in comparison to original book and anime. There is not a single good thing about it besides art.
If you want to experience Shin Sekai Yori do yourself a HUGE favor and watch anime and\or read the book if you want more details and full picture of the world. After this you could read this trash if you want.
I read the novel and watch the anime. Book is good and anime creators did excellent job transferred the plot with all its dark, desperate atmosphere and twists as well as the characters, who act and think like real people from book into anime. But this manga is just total trainwreck. Well, the art is good and there are yuri sex, the rest is beyond awful. The plot and characters changed in a worst way possible, It's just like take good sci-fi book and adapt it for kindergarten. All characters: main, side and even background, reduced to some cardboard cliche heroes of some bad battle shounen, with absolute unreasonable and illogical behavior, who clenched their fists, making stern faces, screaming some nonsense and run towards danger, or throwing a fit and crying non stop. Altered plot is full of shounen cliches, convoluted and oversimplified while trying to maintain some original turns, as result it turns into absolute unreadable mess. Just burn this shit and watch anime!