Conqueror Among Demons: Demon Slayer x Male Reader

Demons...Beasts that feed of the flesh of the living, and torment the innocent when the moon is out. They are creatures of the night who know nothing but feeding off the innocent and forever slaughtering the lives of many. In retaliation, an unacknowledged regime, which would later turn into an army of legend, of elite swordsmen were created in order to battle and destroy the demons who torment the lives of humans. They were known as the Demon Slayers. For over a century the Demon slayers have protected humanity from the horrors Demons, but even with their best, they could not protect everyone. One night, on a full moon, a small platoon of Demon Slayers were sent to investigate strange occurrences of demons being killed and left out on the road in a village. What they encounter on their mission though will change the battleground of Demon Slayers vs Demons heavily...