I'm a Vampire

The Underworld was ruled by Demon God.The group of Higher-Rank Devil stand at the top of Devil Ranking which a bit lower to Demon God, One Who Govern Underworld.They were called Seven Deadly Sin and they were aiming to spread their power to above, The World of Living.Back in the forgotten days, their plan had been stopped by True Ancestor and it's kin multiple times.Some of them eventually...