Chapter 1:Prepare For War...

Muzan had sent hundreds of demons to attack a multitude of villages near the butterfly estate,every hashira and demon slayer known was sent there to protect the village people and find muzan,during the war tanjiro spots muzan and runs off alone to get his revenge...

Tanjiro was easily defeated and begs for his life,muzan was in a good mood surprisingly and let's him live...in the infinity mansion...where he has to be a demon to survive there...

Over the course of his life his strength,speed and power grows immensely surpassing muzan himself as he finally gains his UpperMoon Rank...Negative...