Chapter 4 .

Muzan POV:

" They dare to steal him from me ?? "

I look at the letter that he left for me while eating one of his cookies with the side of blood .

Luckily I can still track him down and lock him away .

But doing so is exactly as luring myself into a shitty trap.

I look at the pathetic corpses who hoped to get help from what's mine and smiled .

" Take these letters and send them to the DSC. Fail and I'll blow your head off."

The newly transformed demon can only obey out of fear as I laugh at it.

Now I wonder how beautiful Tanjiro would look like as a demon , serving me for eternity.

" Kokushibou. As soon as that message is delivered you shall kill 20 slayers , I don't care what rank they are ."

" Understood. "

My business partner , Kokushibou dissappeared in the distance as I enjoy my cookies in peace.

...

The Kamados were very helpful at the Butterfly estate.

They trained and somehow fixed flaws in every breathing technique, it did take months to do but it's still an amazing feat .

Tanjiro became one of the favorites next to Kanae Kocho , the former flower hashira .

Tanjuro was a strict mentor to everyone , not even his children weren't exused to be a little lazy.

Tanjiro often stays with Kanao , Shinobu's and Kanae's little sister and student and does daily stretches and bending with her to better her flower breathing technique.

Kanao also became a lot more self decisive and showed much more emotions.

But as far as treatment goes Shinobu ,Kei and Aoi are the best at it.

One day Tanjiro was stretching with Kanao when a girl with long pink faded green hair, green eyes and white haori came .

" Hello Mitsuri-san ."

" Eek !! Hello Kanao !! I see you already have another friend ."

Mitsuri said making Kanao red and Tanjiro glad .

" I came here because I want to finnaly meet the Kamados !!"

" Well one of them is right here !!"

Tanjiro said making Mitsuri happy.

" Well it's nice to meet you, you are an adorable lady !!"

Tanjiro then looked confused.

" I'm a guy Mitsuri-San."

" Eh ??"

" I'm male , why do people always think that ?"

Tanjiro and Kanao stopped stretching and talked with Mitsuri and Tanjiro asks a question.

" Why don't you put strength in your attacks when you are bending your body ??"

" How so ??"

" Like a whip , You bend your body and your swords bend with you , it'll make your attacks much more difficult to dodge ."

" That's actually a good idea, I wouldn't use so much force to bend my sword and I can focus more on the attack capacity. "

" Glad to help !!"

Soon a crow came ordering Mitsuri to go on a mission.

" I'll test this out! !"

She left and went to her mission.

" How do you know so much ??"

Kanao can't help but be curious after the months the Kamados stayed here.

" Our great-great-great grandfather was taught the Hinokami Kagura , also known as the Dance of the Fire god and passed it down, soon father will dance it at the new years . "

" Oh... "

She didn't get the answer she wanted but it is a start .

" Can't you show me ??"

" No , this breathing technique can only be used by the head of the family. "

Tanjiro was stern on his answer and he was never stern so Kanao understood.

" Let's go back to training shall we ??"

" Yes !!"

After an hour they went inside and a crow came .

" Every helper come outside !!! "

The 2 nod and went outside with the Kakushi, helpers and the cleanup crew of the DSC.

The helpers were nervous but the Kamados managed to calm them down.

Soon they walk in to a massacre and ran to help , but all of them is dead .

" There are no survivors... "

Kei said sadly .

" Don't panic, it's still night and the one who did this might see us."

Tanjuro commanded making them stay calm and then ....

" Someone's breathing !!"

Tanjiro then immediately took procedure to help the survivor .

" I'll bring him back with 2 Kakushi !! You can bury the rest !!"

" Understood !!"

Tanjiro slowly and carefully brought the survivor to the Butterfly estate, not noticing someone other than the Kakushi following him.

" You're a fighter , I know you can keep fighting !!"

Tanjiro returned and gave the survivor to Shinobu as she immediately did an operation.

" Someone else is here ."

" Yes , the Ka-"

" Someone else Tanjiro, run."