Muzan x kokushibou (Reincarnation)

Reincarrnation

𝙷𝚎𝚢 𝚎𝚟𝚎𝚛𝚢𝚘𝚗𝚎 𝙸 𝚊𝚖 𝚠𝚛𝚒𝚝𝚒𝚗𝚐 𝚝𝚑𝚒𝚜 𝚠𝚑𝚒𝚕𝚎 𝚠𝚊𝚒𝚝𝚒𝚗𝚐 𝚏𝚘𝚛 𝚜𝚠𝚒𝚖𝚖𝚒𝚗𝚐 𝚌𝚕𝚊𝚜𝚜 𝚜𝚘 𝚒𝚝 𝚖𝚒𝚐𝚑𝚝 𝚋𝚎 𝚜𝚑𝚘𝚛𝚝. ಠ_ಠ
Koku POV:
I had been dead for 7 years still no sight of muzan-sama, I was at hell right now it was not that bad actually but when I was walking around I saw muzan-sama I walked up to him and tapped him on the shoulder he turned around and saw me I hugged him as soon as possible we then stopped and he looked at me before giving me a slap to the face. "SHIT HEAD YOU MADE ME SO WORRIED" I knew he was Muzan since he was like this most of the time. "Now that we seen each other again I want to show you something I found when I came to hell." I nodded my head and followed him.
After a while
We found the place muzan-same was talking about and the thing I saw was a white oval hovering "do you think we have to go though?" "Yeah I think so." We walked through that thing together and found ourself surrounded by trees I looked up and it seems we were back at earth but my body felt weak a strange man with black straight hair was beside me who was this stranger then he got up looked around. "Where am I and who are you?" I looked at that man. "I am kokushibo." I don't want to say my real name since I don't like hearing it. "KOKU?" The man yelled at me. "Muzan-sama?" "What's up with your hair?" I looked at him confused. "I don't see any difference." I pulled a string of my hair my hair was white I stood frozen. "Oh I see now we went through the portal back to earth and reincarnated." "That makes more sense." I looked around and saw that there were tall buildings around not little huts. "It seems that the city of more advanced now too." Life has changed I could see that "why are we not kids then?" "I don't know." Muzan-sama searched his pockets and found a Card with certain information on it. "Guess this is our new life."