Endless Debt

"Hello, my name is Borogo Lazarus, a debtor."
The wounds on Boluogo's face were healing at a speed visible to the naked eye. The blood remaining on the face flowed back, and the skin was rejoined, as if going back in time.
Facing the demon who was dying of fear, he whispered.
"This is my 'gift' and my 'debt'."
…
Sixty-six years ago, with the end of the Wrath of the Scorched Earth, the Oath City Opos rose from the ruins of the Holy City.
Sixty-six years later, the Kogadel Empire and the Rhine League, two behemoths across the continent, are planning another war that will engulf all things.
The Bureau of Order, the King's Secret Sword, the Monks of Truth, the Orangutan Sect, the Secret Groups...the entities lurking in the shadows of history are trying to join this grand carnival.
Under the curtain, the devils enjoy the pain of mortals, taste the value of sacrifice, play with fate, and grant curses and blessings.
Watching the mortals who are the same kind, hating and killing each other...