First off this is an adaptation of the second book "The Dark Forest" and takes a lot of creative liberties to fit in an anime format and glosses over a lot of the lore. If you're itching to see a screen adaptation then watch the Tencent CCTV live action adaptation first (Netflix series not out yet as of this review). If you're not a fan of the books do not watch this anime you won't like it at all because without background on events preceding this series it will seem really shallow and lighthearted. All-in-all it's okay but as a whole the anime is all stylewith no substance.