"I will never forgive him. I will never show him mercy. I'll kill you, Kibutsuji Muzan!!!!" A boy as normal as you and I. All he had was his sister, his home, and a dream. But after everything was taken from him, he realized something. "Not everyone can be saved". Despite this he picks up a blade. He's not a hero nor a saint. He's a nameless swordsman born under the night sky. After being taught a Breath Style, what will he do when the person who taught him is working for the same man he pledged to kill.

Y/n L/n is the eldest in his family. He soon experiences a horrific event which leads him to training to become a Demon Slayer. However, in the far future, he experiences another horrific event which changes him whole as a person. He turns into a cold, emotionless, cruel and dark person. Will he ever revert back to his old self? NOTE! "I DO NOT OWN DEMON SLAYER NOR IT'S CONCEPT AND CHARACTERS. ALL CREDITS GO TO KOYOHARU GOTOUGE AND UFOTABLE. ALSO, I DO NOT OWN SOME REGERENCES AND IMAGES I WILL PUT IN THIS STORY, ALL OF THOSE RIGHTFULLY BELONG TO THE OWNERS."

In this story is about a modern world scariest assassin reader who had crossed time to an anime world. World of swordsman and demons. Declaimer: I do NOT own Kimetsu No Yaiba or you, ONLY the story plot! Book cover by: Lina-Mizusuki Thank you so much for the Book cover it's actually awesome❤💓💖