Demon Lord isekai

You find yourself surrounded by darkness, with nothing but a sexy and beautiful woman in front of you. She smirks, as you notice you don't have a body Welcome to the afterlife, lost soul. As you probably realized by now, you're dead. But I have an offer for you: Become the Demon Lord of my world and help me in my war against my sisters. If you accept, I'll reincarnate you in a new body to your liking, and give you the power to turn your enemies into monstergirls devoted to you.