The book is a dark fantasy manga that follows the journey of a young boy who becomes a demon slayer after his family is slaughtered by demons, and his younger sister is turned into one. Driven by a mix of grief and determination, he joins an organization dedicated to exterminating demons and seeks a way to revert his sister back to her human form. Throughout his perilous quest, he encounters various allies and adversaries, mastering swordsmanship and harnessing unique breathing techniques to battle the demon threat and unravel the mysteries surrounding their origin and his family's tragedy.

In this dark fantasy manga series, a high school student is thrust into a hidden world of sorcery and spectral horrors when he swallows a cursed object to protect his friends. This act binds him to a powerful curse, and he must join a secret organization of Jujutsu Sorcerers to fight malevolent entities and collect the scattered pieces of the curse to prevent its malevolent power from wreaking havoc. As he undergoes rigorous training and battles, the student navigates a treacherous realm of sorcery, discovering his own latent abilities and the complex moral landscape of using curses to combat curses.

The book is a dark fantasy manga that follows the life of a young man burdened with crippling debt, who finds himself entangled in a brutal world of devil hunters after merging with a devil dog he names Pochita. This transformation grants him the ability to transform parts of his body into chainsaws, which he uses to fight malevolent devils in exchange for money. As he becomes more involved in this violent and morally ambiguous society, he navigates through complex relationships, his own desires for a better life, and the sinister machinations of those who seek to use his unique powers for their own ends.