Becoming a Demon

Saya was thinking about how to kill the Lotus Hashira he was to weak right now and he was alone there would certainly be other Hashira with him and this would be trouble just when he was thinking about it a man with red eyes and pale skin came in his direction and said"Are you Saya Kurogoto?" Saya immediately stood up and grabbed his sword the man then said"stay calm I'm not here to harm you I have something you don't have I have power and I can give you power if you want it" Saya was taken aback and said"who are you?" The man said"my name is Kibutsuji Muzan and I will ask again do you want power?" Saya was taken aback Kibutsuj Muzan the Demon King this is a godsend opportunity if I become a Demon I will have enough power to slaughter my cousin Kirisama (The Lotus Hashira) I knelt down to him and said"I want power what do I have to do" Muzan was happy he walked towards me he then stabbed his finger in Sayas head Saya began to scream because of the pain it brought to have his body modified Saya's hair became longer it reached his knees now and he slowly began to change into a woman Muzan was slightly surprised that Saya changed genders because this has never happened before but he ignored it what really surprised him was how Saya was still absorbing more blood she absorbed so much blood that it is equivalent to all the blood upper moon 3 received this means her strength will be on par with Akaza which is really strange after she received this much blood Muzan stopped Saya didn't faint but was still awake despite the pain being more painful than dying 100 times what really surprised her was her change in gender she suddenly had breasts and her dick was gone her hair was also longer and she was now extremely beautiful even more beautiful than any world class beauty's Saya stood up bowed to Muzan and said"Thanks Muzan-sama I Saya Kurogoto shall never forget your kindness and serve you!" Muzan was happy and said"very well you shall serve me you will now hold the position as upper moon six you will follow me now!" Saya bowed again and walked together with Muzan towards the infinity castle

A week later Demon Slayer Corps HQ

Ubuyashiki called all Hashira here when everyone arrived he said to Kirisama"Kirisama I have bad news for you the whole Kurogoto Clan was slaughtered" Kirisama was sad and began to cry the other Hashira became surprised and all thought'who is strong enough to kill all these old monsters of that Clan' Kirisama then asked"who did it?" Ubuyashiki said"It was your Cousin Saya he gained enlightenment and slaughtered the whole clan I believe he will come after you too" Kirisama was surprised and said"That low life with no talent could never have gained enlightenment he's just a weakling are you kidding me Ubuyashiki-sama!" Ubuyashiki said with a pained expression" No I don't he did it I also received news that the 12 Kizuki gained a new member I think your Cousin is the new member" Kirisama got really angry and shouted"That stupid low life even became a Demon now I don't have to feel any regret for killing him I will kill him and nobody will steal that kill from me" Kirisama was angry and walked away then Tanjiro,Zenitsu and Inosuke came to the meeting too Tanjiro then said"why is Kurogoto-san so angry?" Ubuyashiki explained Tanjiro the situation and he asked again"but why did her Cousin kill his family?" Ubuyashiki explained the whole discrimination thing and Tanjiro said"I can understand her Cousin but killing is the wrong way he should have done something different" the other Hashira all nodded and went away when the meeting has ended Ubuyashiki then said"Tanjiro-kun you will go with Kirisama to help her she is very hot-headed but make sure she doesn't lose herself in revenge"Tanjiro nodded and they left

Meanwhile Saya reached the infinity castle with Muzan and stepped in…