Mankind is an unshakable, strong and steadfast power of evolution, but whenever humanity thinks it is at the top of the food chain, there will always be beings that are above humans: The demons, supernatural beings that devour humans and that only act when the sun goes down, to then generate their carnage until dawn. again. For this reason, the Demon Slayers corporation exists to hunt and exterminate all these monsters.
Y/n Yamamoto is a boy who lived in a village with his mother, a very competent doctor, and his father, a swordsman who came from a foreign land who retired from his work in Japan and who has always been his inspiration for the future. Y/n has always lived learning from his mother about the value of human life and that each life should be preserved and taken only in times of need, while his father taught him about justice and that it should be placed above any selfish desires and dirty, for those who seek justice are destined for great things in the future and a prosperous future. Y/n loved all those teachings and the peace he had with his family in his village, but unfortunately, that peace is gone forever. One night, Y/n's village was attacked by demons and he lost his family in this event, but never forgetting the face of the demon that led the attack and that was responsible for the death of his parents: The 6-eyed demon.
Y/n survived the massacre and was rescued by a demon slayer and find out his father was a demon slayer too. For this reason, Y/n decided that he would follow the path of a Demon Slayer and with instructions left by his family, he began the path to becoming strong enough so that no one else would suffer what he did, even if it cost his life. This is the journey of one of the greatest prodigies in the world of Demon Slayer and his fight for justice to fall on the head of Muzan Kibutsuji, the progenitor of all demons and all demons that terrorize humanity, especially the 6-eyed demon, who swore to find him one day.