King of the Mountain (A Tsunami of Dead Tears-inspired story)

The year is 1919, the Shōwa era is establishing itself after calamity shook the country to its core. One certain individual, after 4 long years of training beyond his limits, unsheathes his crimson blade, stained with countless souls of the monsters that haunt his country. Taking up the way of the sword for the final time, determined to destroy the source, they set out across a country ravaged by the aftermath of the Great War.

In the meantime, a demon, stripped of his dignity and power, has returned, living as 1 of 30,000 men fighting on the frontlines of the brutal war. As old feelings begin to resurge within, he must remain focused on his current objective - rebuild the empire he once controlled and, more importantly, kill the one who wronged him and extinguish the last embers of the fragile Demon Slayer Corps.

As their two paths inevitably entwine, who will come out alive? What characters, both new and old, will play a role in their destinies? And can peace ever be achieved, in a world that seems to fight against it?

In this fan-made conclusion, serving as a potential Part 3 to the famed duology by @Veyrum, prepare for the culmination of the millennium long war between human and demons.

All Demon Slayer/KNY characters belong to Koyoharu Gotouge
All OCs belong to either @Veyrum or me (@GenesisRequiem472)