Beginning Part 2 of the Failure

I transmigrated into a novel, slayed the Demon King, and died—mission complete, right? I can go back to reality, right? Wrong! Turns out this flop story has a second part! Five years after I saved the day, I've reawakened in the same world as a haughty villainess. What's more, my old allies from Part One have all become awful people! I've got new rules and a new body, but it's still the same old mess...