16 years ago the extraordinary happened. A pair of twins were born of both Earth and the Underworld. But that wasn't what made them so special. What made them so unique was that they were the children of Satan himself, God of Gehenna. They were meant to prove to the world that Gehenna and Assiah could get along peacefully. However, things did not go as planned. Both children were separated at birth. One returning to the underworld with Satan, the other remaining on earth. The two ended up living entirely different lives. One fateful day they reunited. Will they be able to get along, or will their different upbringings be an issue. {{Future pairings and ships will be later determined}}