Jason Adams died forty years after the world changed. He didn't awaken powers but survived while crawling in the mud, hiding from monsters and awakeners alike—those who don't have power become the slaves of those who do have powers. But at the end of his life, he was blessed with a do-over, able to go back in time five years before the world changed to build a harem that would be fanatically loyal to him—the Fluid system- binding women to him in return for making them Awaken and become stronger.
Be warned, it's an R-18 smut harem with a lot of lemons.
Reveal Spoiler