DS The Library

Demon Slayer: The Library of Lost Breaths Hidden somewhere beyond the reach of ordinary maps... There is a library no Demon Slayer is supposed to find. Its halls stretch farther than they should. Its shelves never seem to end. And inside rests something more valuable than gold. Every Breathing Style ever created. Water. Flame. Wind. Stone. Thunder. Mist. Love. Serpent. Even techniques that vanished centuries ago. Forgotten branches. Abandoned forms. Styles created by swordsmen whose names were erased from history. Some books contain only a single technique. Others hold entire Breathing Styles powerful enough to rival the Hashira. For generations, the library remained sealed and protected by an unknown guardian. Until now. Books have started disappearing. At first, only minor styles vanished. Then rare ones. Then techniques connected to the oldest forms of Breathing. Someone is stealing them. And whoever is responsible is not simply collecting knowledge. They are learning it. Demons begin appearing with movements that resemble Demon Slayers. Unknown swordsmen use techniques no living Hashira recognizes. Ancient forms once believed lost suddenly return in the hands of strangers. The Demon Slayer Corps realizes the danger immediately. If the thief reaches the deepest part of the library... They may uncover styles that were sealed away for a reason. Techniques too dangerous to teach. Breathing methods capable of destroying the user's body. And perhaps... Records connected to the very first swordsmen who fought Muzan. Now the Corps must find the hidden library, protect what remains, and uncover who is stealing its secrets. Because every missing book creates another enemy. And somewhere inside those endless halls... One final volume remains locked away. A Breathing Style so old... Even history forgot its name.