This is a world where women and men have completely disappeared and only boys like to pretend to be girls. This world has been cursed by someone and to break the curse, someone needs to overcome a total of 12 Golden Ages and 12 Chaos Ages lasting about 24,000 years and then have to fight. to the one who cast the curse. If you can succeed, the world will return to the way it was, otherwise you will die as if you never existed. This world is called Elemental World.