Chounais Stories

Here below the surfaces of Earth, was the ruins of the underworld. Where you can just hear the soul's screaming cries, and the roars of the flames. Nothing else. You can only see the colors of darkness that fills the whole underworld, not ever light. Those who live in their on terror wishes to escape to the Earth's Surface. And those were the Undead and the Demon who has yet to meet. Would Satan, who rules the underworld, let them through the gates to Earth? What will happen if they did come to Earth?