Ouke no Monshou

From Esthétique:
Carol's family discovered an ancient Egyptian tomb that had been untouched for three thousand years. The discovery of the tomb comes with a thousand-year curse. Because of that curse, Carol's happy family is shattered and she is brought back in time to 3000 years ago.
There, Carol meets Memphis, the handsome but cruel pharaoh. Because of her vast knowledge in Egyptian history, she is able to help Egypt through many difficulties and she becomes intertwined with the history of that time, shaping the way conflicts are played out and hailed by the Egyptian people as the Nile Goddess.