Hell's Prince

Best friends forever, Kenshin and Ray are two young college students really close to each other, but one day, as fate would have it, the both of them mysteriously pass away. They are the chosen candidates for the Hell's next supreme ruler. How will these two young ones deal with such a crazy situation? As they are tossed in a completely new world full of war and bloodshed to compete with several others for the right to reign supreme over the underworld, without any knowledge about each other. What even is this competition about?