In an age long past, the demon has become the apex predator. Humanity has been enslaved. But one little girl will change all of that. In this sprawling epic of guns, swords, and demons, Author Veyrum's newest novel asks one simple question: What if Tanjiro never turned back human in the end of KNY? As Takara Agatsuma learns the way of the sword, she must conquer her hereditary fear. She must face labors, duties, and most of all, responsibility. But as the creeping fear of disappointment buckles her, how long until she fails her friends... again? Featuring old characters come anew, and original characters as fresh as fish, the last remaining demon slayers must find a way to produce a cure... lest they all rot in the Dojo of the Rising Sun.