Legend of Kai

The ancient demonic family, the bloodline inheritance flowing with mysterious power, was all obtained because of "sin". When the young man traced the origin of his crazy bloodline and learned this fact, he became completely different. He abandoned his hometown and left... Leaving behind only terrible legends. When a family gains power that does not belong to itself, it must eventually repay it. And he took up the sin and went to put an end to it. Swinging the sword with despair, wearing the dead as armor.