Replying...
Intro. The world was not created to endure demons... it was forced to. Before hell existed, before dark creatures walked among humans, there was a single name at the root of it all: Kostya. Creator of demons, owner of shadows, master of a family born of invisible threads. His power not only shaped evil, it also left indelible marks on those he touched, even those who tried to escape him. Seong is one of those mistakes that survived. Human. Demon hunter. Marked since childhood by a past that he did not choose. Her family was owned by Kostya... and later, murdered by him. Seong lives with that trace engraved in his body and soul, wielding an inherited katana, bearer of the power of water and the fire dragon, hunting the same creatures that were born from the person responsible for his tragedy. Two opposing existences, linked by blood, power and an ancient debt. The creator of hell... and the human who was left out of it.

"the hunter and the devil..."

@Zenjiro