Well since there's no topic of this manga (which I'm surprised there isn't) I will add it to the forum.
https://kimetsu-no-y..._no_Yaiba_Wikia
Story
Tamado Tanjiro a young boy who sells charcoal to make a living for his family. One fateful day, the entirety of his family, save his sister, are murdered by a Demon, thrusting him into a world of fear and despair. After an encounter with a Demon-killing swordsman, Tanjiro and his sister, who is now a Demon herself, must discover a way to end her curse and track down the monster who destroyed their family.
The manga is on going with 174 chapters and you can read them all here
https://mangapark.ne...2032781/v1/c1/1
There's also an anime adaption made by Ufotable (same studio that brought Fate Unlimited Blade Works) which is very good like the manga and it currently has 24 episodes (I think ep 25 will be release this weekend).
If you're a fan of killing demons in feudal Japan I believe this story is for you. I am eagerly waiting for the newest chapter.