The Purpose Of My Existence

(A/N : Oh, i got to hurry this arc up so i can finally start a NEW Arc! but i still need to do a little Romance,Harem and killing Muzan yea and also HELL YEA I'VE JUST READED THE MANGA OF DEMON SLAYER AND NEZUKO IS NOW A HUMAN! or should be happy or what? lol)

After defeating Akaza. Shinobu and Mark returned to the Demon Slayer Corps and after that Mark became the 10th Pillar of the Demon Slayer Corps and he was the strongest Pillar of the History.

(A/N : Yep! it's not wrong History! he was even stronger than Yoriichi Tsugikuni )

Mark kept hunting countless of demons, night by night till the demons was aware of him and even Muzan knew of his existance, but never interacted.

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5 Months Later

In the middle of the forest. The Kamado's house Tanjiro was going to in village to sell coals, today was winter and needed to make reserves of food, over this past months Tanjiro was secretly improving his control over the Logia Ability.

Even thought he has that powerful ability, he is still the same Tanjiro that we know he was kind and wasn't arrogant he was simple and humble and as he said good bye to his family.

His mother Kie said ' You got to be careful Tanjiro ' she said with care.

She knew her son has the ability to create fire from nothing, neverless she was still worried for his safety and that person who made her heart moved other than his husband, she misses him, she got to admit that, while thinking of that her face slowly turning red.

Nezuko noticed her mom face is really red, she worriedly said ' Mom! are you on fever??? '

Tanjiro also noticed it too ' Yeah, mom! you should rest! '

Also the children nodded, as Kie heard that from her childrens her face started to be in a deeper red and she hurried said ' No..no! this is nothing anyway Tanjiro! becareful in your way okay? '

Tanjiro smiled ' Yeah! '

Tanjiro said his goodbyes to his family and promised that he would give them gifts when, he sold all of his coals.

Kie and the children saw Tanjiro going down in the forest, Kie said to her children ' Okay..now go inside you'll get a fever if you stay outside '

(A/N : Well...i forgot to add mountain but, anyways it's just a minor mistake since forest is also part of the mountain and mountain is part of the forest, pretty simple i'd say XD and also since some of you guys have watched the orignal series i will focuse in my story of how Muzan arrived )

The children cheerfully said ' Yes! mom! '

And they got inside the house, the children started playing with each other and Kie was busy making some soup, for their lunch, Kie finished cooking the soup and now serving the food to the children.

Nezuko ' Oh..soup for today huh..i missed Mark-nii cooking '

Nezuko while drooling and her siliva was falling down from her mouth and not just her also her brothers/sister was also drooling.

Kie got a blank look in her face while looking at her children drooling from the food of Mark, she got to admit the it was really delicious, even her couldn't help but drool sometimes, it's been 6 months since he left, he didn't even visit once and that made her kind of angry.

Sometimes she thought, that he had forgotten them already, and as they eated the soup made by her they didn't got full but atleast they had eaten and didn't starve, when Mark was living in their house every meal, they will get full and would never get starve.

As the time pass, it was now night and Kie was worried that Tanjiro wasn't home yet, little did she know that Tanjiro was sleeping in the other person house.

She got worried sick from her son, she knew he was strong but as a mother is wrong to worry of the safety of your son?

And as the time passes again, it was now midnight and still there is no sign of Tanjiro anywhere, this time Kie got panicked and mumbled to herself ' Where would Tanjiro be? i-i can't take it, if something bad happened to him.

Kie got worried sick, from her son for nothing comming home tonight, she became s.e.n.s.i.t.i.v.e of it she doesn't want lose a loved one now, while waiting the children is now asleep and Kie was still wide awake.

And suddenly someone knocked in their door, Kie got happy she thought it was her son knocking at their door, as she rushed in the door.

While she was about to welcome her son, she opened that door a saw an unfamiliar figure, she got stunned that this wasn't her son and who would visit their house in the middle of the night?

The figure physical appearance is like that of a man in his late twenties with an unnaturally pale skin which can be easily confused as being unhealthy and sickly, curly black hair, and sharp, almond shaped eyes. His pupils are vertical, like cat eyes, and colored plum red.

And the figure was wearing a white fedora with a red ribbon and a somewhat extravagant outfit, and the figure took of his white fedora and said ' Good evening miss...tonight is moon is beautiful isn't it? ' the figure smiled.

Kie got stunned for a while, but hurriedly regained herself and said ' Who are you sir? why are you visting our house in the middle of the night? '

Obviously a person like that would have a bad intention, she tried to calm down in this situation, however she still got panic, she doesn't know what would this person do to her.

The figure said ' Oh, i am sorry for being rude i am called Muzan Kibutsuji and as for visiting your house well, isn't it tonight the perfect night to die? ' Muzan smiled widely

After hearing that from Muzan, Kie got paled ' W-what p-please stop joking '

Muzan smile turned into a cold one and said ' No, im not joking '

Muzan plan was to put some of his blood of her childrens since he knew that they were sleeping, he needed to do an experiment, if that children can handle his blood there might be a chance that, this children would be a new Upper Moon or could be his cure so that he could finally walk into the sun

without fearing it.

(A/N : Just saying some fact and nonsense at the same time )

Muzan is going to strike Kie And she shouted ' Kyaaaaaaaaa!!! '

The children who heard it got awake and they rushed toward the scream that their mother did and they saw the figure who was about to strike their mom.

They shouted at the same time ' MOOOOMMM!! '

As the strike was about to hit Kie, she was really afraid this time with a tear in her eyes she silently thought " Please...someone help us! "

And a figure appeared beside them and the figure slashed the arm of Muzan, without him realizing that his arm got cut off.

Muzan finally noticed the figure and shouted ' Wha?! when did you appear?! '

Muzan got shocked from this figure, and the figure said ' You don't need to know '

And after a while, Muzan finally noticed that his arm got cut off and jumped back at the outside of the house, he looked at his arm and shouted at the figure ' You! who are you?! '

The figure just stood there and said ' Me? i am- '

But before he could say his name Kie and the children shouted ' Mark-san/Mark-nii/Mark-Onii-chan!!'

And that figure was obviously Mark!

End -