Review of No Game, No Life: Zero

I have watched countless animes, and what I am seeking is someting special. If a anime makes me feel the soul of itself I will cry and laugh which rarely happens lately. But this is one of those rare gems that makes me cry and feel with the story as it´s unfolds. You can argue that it´s to short but I have never cried this much watchining anyting in a long time and that is why I rate it a 10. What I want that I am missing is like backstory to the world in more details like who created everyting and stuff like that.Like a backstory similar to the greek gods but more simplistic like how they created stuff and the reasoning behind it. They could have made a serie just explaining the past of the world in similiar fashion to starwars univers as the old republic.