L/N Y/N is a very special case of human being. She is born with a pure blood. Her blood is so pure that no amount of demon's blood could taint it. One day, she encounter the progenitor of demons known as Kibutsuji Muzan. The said man tried to inject his blood into Y/N's vein in hope to turn her into a demon. But no matter how much he gave her, she remains a human. This makes him feel frustrated. But for some odd reason, he just can't bring a heart to kill Y/N. Instead, he seems to develop some sort of infatuation on her... or one would call love. A feeling not once have he ever thought of developing. What will happen between Y/N and Muzan? Will Y/N return his feelings? Read and find out in... His Weakness Disclaimer : I do not own Demon Slayer. Any storyline that didn't appear in the anime will purely be the product of my imagination. DO NOT TRANSLATE OR COPY WITHOUT PROVEN PERMISSION!!!

Over a thousand years ago, (Y/n) was a human and lived with her family in a village. (Y/n) had been born with a fatal disease that had no cure so there was no hope in a good life for her. When (Y/n) turned 16 she was put in an arranged marriage and she was upset from this. Thinking that her life will be bitter and hopeless in a love less marriage and die young from her disease. But one night Muzan gave (Y/n) A choice to become a demon to leave behind her old life and start a new one as a demon. She had accepted the offer to become a demon. Muzan said (Y/n) was special because... And when the upper moons see her for the first time. What will happen? ⚠Warning⚠ This book contains Blood, Gore, Death, Violence, Bad Language, Abuse, Sexual Themes, Angst, and Trigger Warning too. Starting date - July 18, 2023 Ending Date - ??? Highest Rankings ( So far) #1 uppermoon #1 uppermoonzero #1 uppermoon0 #1 domaxreader Hello! I'm starting another demon slayer fan fiction and if you are under 18 or is sensitive to the stuff listed above then this book isn't for you. You've been warned. But anyways I hope you will enjoy it. All rights to demon slayer and you own yourself. I only own the some of plot stuff. And most art made is made by me :) So... I will be busy drawing all of it 🥲 Update: I know I've been offline for a while. And it's been almost over a year since then I think even more. But I'm back on. So be ready to see some updates soon in a few weeks! :D

Being a normal high school student, and really into anime. Especially Demon Slayer! But you sense something unique about the Tsugikuni brothers. Mostly Yoriichi... One day, on your way home from school, your house was completely ruined. Cans, cookware, pillows, blankets, chairs, food, everything was on the floor. Who did it?! A Burglar?! Of course not, but the one and only Yoriichi Tsugikuni himself. #1 in yoriichixreader