The True Demon King

Spider family mountain mission

Zenitsu, Inosuke, and I head out after we got some rest after the last mission we were all on we all had broken ribs and bones and were injured but it was not fatal. We all got the call that they need help in the mountains we start heading out it was dark when we got there and Zenitsu was crying saying he does not want to go into the creepy forest I could smell that Inosuke was super happy and excited that he got to go fight demons. We head in soon after, but then we find one demon slayer being very conscious and I introduce myself and Inosuke and he said they need some hashiras, not more mizunoto's. He starts telling us what happened and we are just beyond shocked at this they were killing each other as he tells us that somebody gets up and attacks us I could smell the strings and how they were connected I cut them and they were free but only for a short time and that demon started getting emotional and I asked inosuke started using his 7th breathing form called Spatial awareness he soon found her and said
"Follow me this way monjiro I found her"
I go and get the other demon that was controlling the demon slayers. I ran and after a little bit of time, I found the demon I went to slay her using first form water surface slash but she was panicking and then she gave up and wanted to be killed so instead I used my fifth form blessed rain after the drought when she had her head on the ground she smiled at me for some reason but I just gave her a look of kindness before she died. Then I ran off because I remembered inosuke was still back there and he was bloody but he said he was fine I tried to help but nope he would not let me do that he was just being stubborn. I heard lightning I did not know where it came from because I could not smell thunderclouds and the scent just got stronger it was messing with my senses we suddenly saw a girl come out of the forest she was one of the demons and I called out to inosuke while he was running to get her she calls out
"Now father!"
A huge spider demon thing comes down and screams as inosuke jumps backward while Inosuke deals with that one I chase the girl, and she had a good distance, but I was so mad at what I saw and screamed
"Is she not your sister!?"
"She is, and that's connected with a strong bond but she did something wrong so it can't go unpunished" Rui states
"That's not how you treat your family it's forgiving and forgetting with family!"
I go to attack and he attacks back with more webs and I step back so I don't get hit that bad just a few cuts but then he sends something I can't dodge and nezuko takes the hit for me I rush over holding her  he left wrist will and can fall off soon he noticed our bond and how strong it is and the other sister says
"I thought I was your older sister and we had a strong bond!"
Rui cuts her head off from her body then we started fighting and he took my sister and told me she was his I exclaim
"Nezuko is my younger sister and she has feelings and emotion and she is her person she is NOT a thing!"
We begin to fight once again my sword was still broken but I still fought he trapped me in the red thread but just as that was happening I could have sworne that my life was flashing before my eyes as I saw my dad telling me
"Control your breathing and become the sun god Tanjiro"
I remembered and after that, I realized that I was switching between water breathing and sun breathing I cut through the strings and get closer closing the distance he started jumping back to create distance he failed then nezuko woke up and awoke her blood demon art explosion blood it made a wall so he could not see me and I cut his head.
It did not work I could not smell the burning like the other times that I killed demons I start crawling the best I can to get to nezuko he tried to kill me while I was down because he was done with me and I made him angry I realized that but I stayed calm I was fine? How was that possible then I saw the man who helped me before Tomioka Giyuu the water Hashira a few minutes after he killed the demon. I was relieved by the fact I was ok and nezuko was healing up sudenly another demon slayer goes to kill my sister but thanks to Giyuu she did not I was greatful and then another sudden thing happned a girl goes to attack after Giyuu was holding the purple tipped haired woman she was the girl from final selection she went to go kill nezuko saying they had to get me and nezuko but they had to kill nezuko i told nezuko to run and don't attack she knecked me out i don't know what happned after that.