Muzan x kokushibou (Reincarnation)

A new life

Koku pov:
The body's given to us were strange and weak, I looked back at the card and found this body's name "aren kuboyasu."
If you know what I mean 😏
I wanted to change the name but first I have to ask what muzan got. "Shun kaido." I looked around and saw a guy riding a bike, "hello there can you tell me what year is this?" The guy looked back and waved. "The year is 2013!" "Ah I see thank you!" I looked back at muzan "it is the year 2013. We have reincarnated in the 20s so everything might be very different." I searched in my pockets and found cash, keys, a rectangle box, a square connected to one wire with a nob at the end and a wallet. I opened the wallet and found more cards, I tried to use everything I had and found out the rectangle box can glow. 'This might be helpful.'
Muzan pov:
I found everything that Koku found but no keys. I tried to use the rectangle and pressed the buttons for a long time. That's when the "phone" opened I found the name as the screen showed a large black text. "This rectangle box is called a phone." Koku replied. "Oh so that's what this is called." I wiped the screen and found out there are things that move I clicked on the box which was titled "google" and found a box that said search I entered on how we can find information to know how the times changed. A white building showed up and on bold black letters said 'Library.' "We need to go to a library to get more information." Koku eyed me. "Ok then let's go I found something called google map to help us go there."
After they arrive........
"We made it, let's enter."  I walked in front of a lady at the desk and asked where the history books were, she pointed at the 5th shelf the lady wasn't that old maybe in her late 20s. She then looked at me and winked, I could feel jealousy fill up inside muzan-sama as he was right next to me. I grabbed his hand and walked over to the shelf before a fight could start and I don't want to stand out right now. We walked over and looked at the names of the books I found 10 about the demon race and we read them all.
After reading bc I am the most laziest person on earth.
"So the boy with hanafuda earrings were the last demon."  "Look muzan-sama that's you in the picture." I pointed to him in the book. "Yeah I still look very handsome- let's get that over with and I guess after reading how Japan established we found what everything is
used for." " Let's go to city hall to change our name because I don't want to be called 'shun' I will stick with my real name and so will you Koku." "Ok then." I was thinking to stick with kokushibou but i guess I need to change it to my real name even though I hate it. Then a thought hit me, what if yoriichi also got reincarnated? Life would have been pure hell. "Let's go Koku!" I got out of my thoughts and looked at muzan-sama. "Y-yeah let's go."
...
What if yoriichi got reincarnated too? Let me finish the next chapters.
😉