Hundred of years ago, a certain human was summoned, reincarnated into a demon, changed into an evil spirit, and sealed into a temple. The evil spirit, refusing to go down like that, cut a piece of its soul and let free to reincarnate as a monster time and time again to escape, but thanks to its strength, all bodies that it found ended breaking down or killed.
But one day, the evil spirit awoke in a worthy vessel and decided to finally start its revenge against the world that cursed its existence.