A never-ending war between two Races. Everything began with the Humans' invasion and everything will end with the Demons invading this time. In this turbulent times, a Human was chosen as a Demon Prince and got acknowledged by two Arcanum Artifacts to control his loyalty. What is the Demons' objective with this decision? Could they have a special use for a willing Human? Or will everything end just like the Prophecy Slab had predicted?