the hope of the modern world(male reader x modern demon slayer)

it's a shame really. how everyone's hopes and dreams can pile up, clam together, and accomplish everything they set out to do... only for their efforts, their sacrifices to be wasted. the demon slayers of the past thought they won, they killed Muzan, but what they didn't account for was the remaining blood of Muzan in Tanjiros body. when Tanjiro died, a clan who worshipped Muzan as a god dug up his grave, extracted the DNA that remained, and spent decades extracting and replicating it. around the start of WWII they succeeded in their mission, they made a blood born demon, who ate his mother from inside the womb. and thus started the new era of demon slaying in the sixties, and continued for multiple generations. now, in the present, a descendant of Tanjiro, lives on ignorant to the existence of demons... that is, until a demon attacks him in the dead of night, causing a big scene, and even gaining the attention of a hashira. now thrust into the world of demons, y/n Kamado begins to learn breathing techniques, and begins to shine as a beacon of hope to finally end this century long conflict.

I don't own demon slayer, any art, gifs, or pics used in this