Why Can't Humans Do It Too?

[Current World: No Game No Life ZERO (Completed) - A Comprehensive World of Various Yokai (Completed). Actually, just reading the first volume is enough; the rest is up to you.] [This book has no tragedies; the author prefers happy endings. Not having read the original work won't affect your reading experience.] War, plague, famine, countless natural disasters—the earliest humans, torches in hand, struggled along the rugged path of civilization. But Suer never imagined that one day he would struggle under an even more terrifying despair, desperately trying to survive… The ceaseless war between the gods and their creations, the planet's surface being relentlessly altered like an oil painting, the entire world marching towards death… Even humanity itself questions—why can humanity still exist? And, can't humanity not? With these questions in mind, Suer's long journey has only just begun… [Synopsis not easy, please read the plot.]