The Demon King's God-Slaying Princess

One is the daughter of the god of war in the divine world, and the other is the king of the demon world. In her last life, she was so infatuated that she wronged others and fell into despair. He gave her tens of thousands of years of cultivation in exchange for her immortal soul. They were reincarnated again. They met and fell in love, but she could not let go of the hatred in her heart and wanted revenge. He would protect her every step of the way. Without him, he would give her whatever she wanted...