Act 6: Muzan Kibutsuji

Rise of the Demon King Tanjiro VS Demon Slayer Nezuko

**Originally posted in Fanfiction and Archive**

Published: 04-24-20 - Finished: 07-16-22

Important note from the REAL author of this fanfic Rise of the Demon King Tanjiro VS Demon Slayer Nezuko: Please report Gaby_Dagohoy who reposted my fanfic here in WEBNOVEL, without my permission...what more he claimed he own this fanfic that I wrote with blood and sweat.

Kanon58: IM GONNA GO BACK TO WORK STARTING MONDAY MAY 18TH darn, ghhh limited free time to type chapters, also heeey some people sending me threat letters to drop this fic. STOP IT. Anyhow since Kimetsu no Yaiba manga has ended and we lack some information of Muzan's past...I gotta invent something from what I understand from his very small life scene flashback in the manga. Its still a fanfic so do not take it so seriously...plz xDD btw i took some facts in wikia like Muzan name origin. IM NOT GONNA DROP THE FIC, SORRY HATERS!

p.s. Sorry But I cannot find a beta reader. plz stop sending flame message, dont get work up on a fanfic ITS JUST AN EFFING FANFIC WHY SO ANGRY. IM SAD SOME PEOPLE CALL THIS FIC A TRASH cuz of poor english.WHAT IS WRONG WITH YOU PEOPLE?! :(

Some were kind to me about betaread, but i dont want them to be obligated ifyougetwhatimean. So decided i wont get beta read. Promise u can still understand the fic. MAKE SURE TO LEAVE A LOVELY REVIEW AM GREEDY TO KNOW U ARE READING THIS UP UNTIL NOW. LET ME KNOW U GUYS EXIST I DONT BIIITEEE X3

As Said English sucks so do Not Except it to be written beautifully or whatever. I'm doing this out of pure fangirling and fantasy.

No Flames you are not a Breath Flame User xD

COME ON BARE WITH ME IM SORRY D:

Im just doing this cuz of Quarantine, But once everything is back to normal I will be busy on my Work again as an Adult. SAD ADULT FAR AWAY FROM ANIMES HUHU

REVIEW To inspire me to update. ROLF

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Placing their sleeping lord to the king size bed.

"There." Putting handcuffs on the boy's wrist and legs.

Kyoujiro and Muchiro stared at their Sun.

"I wonder if he is dreaming~?" Muichiro giggled with that happy, curious thought. "Tanjiro-sama...Your sleeping face so beautiful~" fanboying.

Kyoujiro face palmed.

Muichiro is really like this.

Meanwhile, Tanjiro's mind had traveled back in time. The encounter with the Demon Slayer named...

(("Nezu...ko..."))

Ne..zuko?

Nezuko?

Nezuko is nobody.

Don't think about her.

She is not related to you.

Remember who you are

You Are...

My Heir~

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The Heian Period.

Tanjiro had a dream. A dream about the late Kibutsuji Muzan.

A scene from 1000 years ago. Were there were limited house to be seen. Where mostly part of japan is deserted.

Here is a castle, A castle for an Emperor.

There is Muzan on his luxurious Japanese futon in a sitting position. Today is another day to drink his medicine. He is wearing a white elegant kimono for men. The only problem here were the fact his beauty is not known from this world. He was never allowed to go outside.

If he go outside, he will faint. He can barely use his legs now. Since birth he had always been a dying infant. A dead soul.

Yet a Miracle happen, he happen to outlive his baby life span into a kid, to a teenager...Until he reach this age. 19 years old. He will become 20 years old soon.

"I don't want to drink this anymore!" SPLASH!

Angry Muzan at his bed spilled the cup of his medicine to the maids. "Where is the Doctor?!" His skin were very pale, it almost scared his maid. He looked like a corpse to be exact.

Muzan can feel their stare, their pitiful stare towards him. He hated that treatment. "What the hell you are looking at me for...?" he warned the maid. But then again, without warning he smack the empty cup to one of the maid's face.

SMASH! "Kyaaah!"

Blood had gush out from the poor maid's head. Muzan is very violent despite the thing...that he is very sick. "GET OUT!" he commanded them. The maid's scramble with their feet and immediately left the room. One maid even bothered to apologize and acknowledge his request earlier. "F-forgive us Muzan-sama, The doctor...w-we'll call for him. W-we take our leave."

The last maid said as she disappeared from Muzan's sight.

"They are all useless...!"

The sun is so bright as usual, Muzan is so envious. "When...?! When Can I..." he was a little bit of a child during this age. "When Can I even play and stroll at the sun...?" Muzan gritted his teeth and cried. "Why can't I...?" despite his tears, he did not look weak. More like his tears were from pure rage.

'Why Did the heaven's made me suffer...? Aren't I an important person on this nation?'! Yet...why, why always this room!'

Muzan is the heir of their clan. The Kibutsuji is the most powerful clan from this era. They actually have a long relative whose also rich, under the surname of Ubuyashiki.

Even though they were relatives, there was a bit of competition in regards authority and treasures. Kibutsuji clan were... they are the Emperor and the Empress. Sadly, Muzan will never become a King. Because he is born with an illness that will eventually consume his life and die without even achieving something big.

Muzan never had any friends, therefore he had this kind of mindset. You can only understand him if you kneel before him. Your level should be lower than his feet. Lower than him stuck in this bed.

Muzan looks above the clear sky. It's not like he has not seen them, he just never felt them. How he wished his foot can walk to the grass filled with heat. How the bird's fly beneath the sun and chase them. Play tag with other people and win the game like a boss, have a date with someone he might like as his Queen. Be known by all the people how great and smart he is. How beautiful and handsome he is if not for the impending death.

A Perfect Emperor. A Perfect King over the feeble human's.

Muzan wanted his parent's to be proud. But all his parent's looked at him was...dismay,fear,sadness,pity.

Muzan know's they only let him live with these try hard medicine's because they need a heir. If their people found out there is no heir, the authority might be stolen. Possible Ubuyashiki will throw their throne and become the new high being in charge. 'Do they really want me to live...?'

Muzan has no sibling's. His mother couldn't give another birth. It is partly his mom's fault why he was given a weak body. Muzan do love his parent's...just, just sometimes, He did not seem to feel an actual display of love. Muzan lack that kind of intense relationship. His heart is too weak to even try and get serious on someone's kindness.

For him it is natural to serve him.

You have to.

Because frankly, he hardly even seen them visit him his room. Unless the people would ask where is their son, suddenly they would visit him and ask if he is ok. If he is cured.

No, he cannot be cured. 'Are they just waiting for me to disappear...?'

Rumors began to spread that his illness maybe infectious to others, which is why he is kept hidden. It is starting to annoy Muzan. Really, he even heard the rumors from his maid's...that his parent's didn't want for him to wake up because they had accepted it already, that their baby is dead the moment he was welcomed to this earth. They put him on a funeral box.

"Am the only one clinging to live...?" Muzan asks the air, knowing nobody would understand his suffering. "If I won't be healed...might as well.." he had an evil thought.

That psychopathic thought. "Might as well ,everyone dies with me!"

...Until one day.

Muzan hit his limit from being temperament. The doctor came.

"Here, Please drink the Blue Spider Lily...I know you do not like to taste it anymore...It has been 3 years, But Am sure, It will cure you. It just...takes..some time."

Muzan glared at his kind doctor, who never give up hope of his cure. "And when is that day...?"

The doctor gulps down. He is still careful of his words, because...Muzan is still the son of the Emperor.

"The Day the Sun meets the Moonlight."

Say's the doctor.

Hmm, Is that an Eclipse thing?

Muzan had drink and took up many different kind's of medicine from different doctor's from all across the country. So he doubt this weird blue liquid called Spider Lily would make any difference.

"Forget it." Muzan's hand spotted a machete. Don't ask why is it there. Muzan was in the verge of psychopathy remember? He swore that if he will die, everyone should die. "Answer my question." Looking at the Doctor's eyes.

The Doctor still had those gentle smile despite the reality that this is futile. "How long do I have left...?" Muzan wanted to know, if he will even reach his 20th birthday. Honestly he cannot feel his leg's anymore.

He had this strange illness...There was no name for this illness. It's just a disease that makes his skin pale like an albino. Make's his nails blue as if they were been pinch by a hammer. His leg's and feet walks too slow like he is old or something. His sense of taste is disappearing. That...his stomach cannot handle human food no matter how tasty it was made.

They say sick people rejecting food is basically in the stage of their near end of thread.

This was his illness. Nobody can even cure it. It is too vexing and unfair for him.

The doctor was giving him a quizzical look before scratching the back of his neck and sat with a very straight back. In a manner of like giving a formal apology.

"To be honest with you Muzan-sama..." the doctor had look to his eyes. He was genuinely honest. "You will die before you even reach your 20th age." The doctor bowed his head before facing him again with determination, with the touch of showing the empathy he feels for him. "Unless if this medicine I made from the Blue Spider Lily will work, though it's still experimental stage, I'm trying my best to save you..I'm sure you will-"

But Muzan is blinded by rage. When he heard the word you-won't-reach-your-20th-birth-date.

SLICE!

...He sliced off the Head of his caring Doctor.

"DIE YOU USELESS VERMIN." were his last curse words for him. Muzan stood as his clothes were stained with blood. His hand's were also bloodied.

pluck,

pluck,

pluck...)))

The sound of the blood echoed in his crazy ears. Muzan had become crazy.

Gritting his teeth too much, Muzan's teeth had fallen off. CRACK. "W-what?!" terrified, Muzan was terrified. He catch one of his tooth onto his palm. 'Is this my tooth...?' His hand's shakes in a huge disbelief. "My...My teeth is falling off...Am dying now?"

Frantic, Muzan looked for a calendar in his wide and lonesome room. "It's...? Today is..."

The calendar says..JUN 2nd one more day, 'wait, it's tomorrow!' ...Soon it is going to be...June 3rd if the sun rises up. His 20th birth date.

Actually, this June 3rd was not his birth date. His parent's named him 'Mu-zan' as the mark of their baby's death. The Mu-zan meaning is June 3rd, The day of his funeral supposed to be if he did not made a noise of infant cry.

But because he outlive the funeral box for him, they decided to name him Muzan, like a grim reminder that death had always been by the side of their one and only son. His hallow heart beats so fast. Fear, the fear is haunting him.

"June...2nd.." Muzan toss the machete around the room and quickly sprinted to ran outside their hallway. Before the sun rise! Muzan urge to see the world!

hahh,

hahh,

Panting, sweating, trying so hard to move his body that is already being consume by the stupid, cruel disease.

Muzan's parent's happen to be in the hallway, bewildered how their son looks like. "My god Muzan! How were you hurt?!" his mother called him for attention. Muzan has no teeth...his finger nails were blue. His skin is more paler than before. His eyes..his eyes had looked like he had some eyesore.

Little did he knew, he was actually turning into a supernatural being.

"Mother! Father!" he spitted some blood as he try to speak, it sounded like he was pleading, "Please...Please just this once, let me out!" Muzan yelled on the top of his lungs. He was too desperate. "I WANT TO GO OUT!, IF I'M GONNA DIE...BEFORE I TURN 20 YEARS OLD, AT VERY LEAST...LET ME SEE THE OUTSIDE WORLD!"

His father who had the worried look, had stiffen. "Muzan...We knew you won't live really long..." His father give way the hallway they are blocking, for him to go ahead and go somewhere he wanted as his last day. "You may go now."

His mother cried out though, But Muzan is too detach to feel any sorry emotions to anyone who pity him. 'I do not need your pity...! It was the two of you...your fault for not giving me a healthy body!'

Muzan had proceed to run outside the castle.

It was early dawn. The sun is above to rise.

"Am...Muzan Kibutsuji!" He says his name out-loud, acting proud. "This day is-" when his feet touched the ground shade with the sunlight.

It burned.

"Aaghh?!" Quickly he stepped back inside their castle that had roof. "W-why...?" Muzan is intelligent. If his feet had burned from that little sun rays and hurt like hell...then maybe his whole body may burn.

Muzan had decided to close the door as he lock himself back their castle. "What is going on...?" Next his tongue rolled inside his mouth, there were fangs.

"My teeth went back?!" His fingers traced the fangs inside his supposed to be bleeding mouth. "Sharp...teeth?"

Muzan finally notice his finger nails too. They were blueish, 'wait...that is normal.' What is not normal were the claws.

"W-what is this?" Confusion began invading his head. He wanted to think what in the world happening to his body. Suddenly changing so inhumane colors...

His guess was right when one maid found her at the door. "Muzan-sama...? Why do you have blood-"

Muzan decided to look behind him. The maid screamed in horror. "AAH?! D-Demon..!?"

Muzan arched an eyebrow, he was a bit offended. "Excuse me? Can you elaborate?" Is it because of his bloodied kimono?

The maid pointed out for him. "M-Muzan-sama..your eyes are plum red!"

Muzan furrowed more his eyebrow. Simply irritated, "Bring me a Mirror!"

With that strong command, the maid went away, a couple of minutes went back with a hand mirror. The oval shape authentic mirror, there reflected...

Devil Eyes

Vicious Fangs

Sharp claws

Albino complex

Mysteriously his hair became so silky when they used to be dry.

"...Am not human?"

BADUMP, BADUMP,

Muzan was diagnosed with a disease that will kill him before he reached the age of 20. He sought medical assistance from Blue Spider Lily, but he turned into a demon as a result.

At first Muzan thought he is dreaming. Wearing a brand new black Kimono giving some commanding vibes. "Today is supposed to be my last day..." he was standing in their garden, the moonlight is fully visibly and it did not burn his usually fragile skin. His bones doesn't hurt anymore.

Nothing hurts!

"Am now officially 20years old." Glancing at the field of flowers they have at home...the Red spider lilies are blended well in his exotic beauty.

"And am alive...?"

The wind blows.

Muzan who was being emo earlier slowly...begin to laugh. "Aha...haha.." his body trembled, it was not fear. It was excitement.

"Ahahaha!" His dark laugh have made his eyes glow like a red moon. "The medicine of that doctor actually worked..?!" He mocks no one. "Can you believe that~!?" He ask no one.

But for him, the gods have agreed with him. He did not die when he was diagnose to never reach his twenties!

Muzan have dance his bare feet to the cold grass. Held up his hands in a manner of 'am free' that iconic titanic pose. Muzan twirled as he kept laughing in joy. "Ahahahaha~!"

Muzan is dancing beneath the wonderful Moonlight. "Yes~! Yes~!"

Muzan pluck one of the Higanbana on this silent garden. He sniffed and mesmerize it's wonderful scent. "Ahh~" doing a dark chuckle on his own world. "The scent of death~" grinning. "I had overcome it~"

GROWLS~

Muzan stopped for a moment, he heard his own stomach growled.

"Hm~?" He touch his stomach to make sure that he felt it.

GROWLS~

"Am...hungry?" He mused.

Why is he surprised? When his body had become weak, he no longer feels hungry. He even vomit's the meal after consuming it. It's an anorexia thing from his weakened state.

So even if his stomach growls, his desire to eat is low.

But now, he is entertained to eat!

He feels like a living human again!

"Right. I will eat dinner with Mother and Father~" he had that happy imagination that his parent's will rejoice with him. He is cured now after all~!

...

His Father and Mother were a bit shock how Muzan's appearance had change. The dying face of their son earlier in the morning is gone.

Muzan's face is so bright yet mystical. "Muzan...my son," his Father called his attention, as they are all sat in this long expensive table. They are planning to eat together. "Yes Father?" The way Muzan replied is to boast that he is very educated.

He arched his back to show off his silver spoon vibes. "Your eyes...Are they okay?" His Father had a crack laugh. "I mean...you are not blind right?"

They are worried the red eyes of Muzan were defective. Muzan shakes his head and showed them that assuring smile. "Father, I appreciate your worry, But I could see just fine~" he made a pleasant bow. He even joked. "I believe it is the side effect of the medicine..." he brush a bit of his curly black hair strands away from his eyelids. For them to see his pupils have change to somewhat cat irises.

They decided to accept it, since Muzan actually looked better than before.

His father blinked in response. "I...see," Then coughs, "Um...about The Doctor you...killed," he trailed off. He just wonder why his son did that. The Emperor and Empress are not kind ruler. They are immune to sadistic and killings.

That's why, knowing their son killed the poor doctor out of annoyance is normal.

Because for them, they own everyone.

That's the bad bloodline of Muzan. Selfish, proud and lacks any empathy. Indeed fit to be a Ruler.

Dominating all.

Muzan chuckles, "I apologize the mess I made." Muzan displayed a little bit of repent emotion. "I shouldn't have killed him...He is the one...his medicine cured me."

The Father this time chuckled, "We already cleaned the room. It's ok now...glad you are back in shape son." The smile of his father was not caring, it was a smile happen to be there, that they do not have to worry of loosing authority in this country.

His Mother sniffs a bit in a tears of joy. "Oh Muzan~! I really thought today is your last day...The doctor told us the truth. It was yesterday, he said you will not be able to celebrate your 20th birth-date." His Mother cleared her sob into a relief smile. "I'm glad."

Muzan of course smiled back to his parents. He showed them he is strong and not a pitiful creature.

"Alright!" His Father clapped his hands in a way to call the servants. "Tonight is a feast!" The servant's revealed themselves one by one with all delicious and expensive food that is existing in Heian No Jidai.

"Eat well Muzan~" her mother cheered.

Muzan's smile widen. He always wanted to eat with his parent's. He always wanted to enjoy food without loosing his sense of taste. Drinking different kind's of medicine everyday can destroy your tongue texture sometimes...

"Yes I will Mother."

However...

He will discover, the other side effect's of not dying...soon.

"Thank you for the food," he proceed with his chopsticks and took a bite from his plate.

CRUNCH.

And began...chewing them.

"How was the food Son?" His Father and Mother is looking forward for him to appreciate the food, he never had any favorite food due to his illness. So they want Muzan to like the food.

But...Muzan whose chewing on the food had a twisted face. As if...the food taste awful.

It happend.

Muzan covered his mouth, "Mmph!?" he tried to gulp it down. A bit later he pukes. "Muzan?!" His parents were worried. Muzan himself is worried too. 'W-why does this food taste like a rotten fungus?!'

Were his thoughts.

One of the servant's went near him and cleaned the dirt on his mouth. "Muzan-sama...are you not feeling well again?"

Muzan swatted the maid's hand. He think's of it as an insult. "You fool! How dare you assume me as sick?!" He gave the maid some death glare. "Watch your mouth or I'll kill you too!"

The servant squeaked in fear, she bowed and back down. "S-sorry Muzan-sama...!"

His Parents starting to whisper to each other. Then he heard them "Maybe...you aren't really cured?" Was his life just extended...?

Muzan expression were stiff and sweaty. He was reminded about the sun burned his toes.

"Noway..." he start to clutch his head in confusion once more. "Am...saved right?" He did not want to believe that he isn't really cured. But it is sure is odd, how a little sunlight will burn his pretty skin and this supposed to be delicious food, taste so disgusting in his taste buds.

So bad that his stomach can't handle it!

"Muzan...I think you should rest..." his mother had a forced smile. "Come on, let the servant's help you back to your room."

Muzan is disappointed of this outcome. It is a bummer, but he lost the cheerful mood. So he complied. "Yes, Mother...Father."

He went back to his room. Surprised it's been replaced. The bloodied tatami, wall and his futons.

No signs of murder...

6 days had passed.

Muzan avoided the sunlight as it does burn him.

Muzan forced himself to eat human food.

But every-time he consumed them, his anorexia went back. By the end of the day he had to vomit them. None of it will remain in his stomach. But on the other hand, strange as it sounds...he feel much stronger.

Despite not having a proper consume lf his meals, he walks faster, he talks smoother, his hair is always healthy and wavy. His sense of hearing and seeing were sharper. He was smarter and athletic than before. Last but not the least, he does not feel tired nor sleepy!

He is full of energy.

That is why his parent's are no longer disturb of his new appearance, you can see he is living man and not dying, and the fact that he still waste food.

But he is also reaching his limit.

He began to have hallucination's that people around him are meat.

"I'm so...hungry..." GROWLS..."Shut up! You indicent stomach!" He punch his own. Lately it is becoming painful...this stomach who reject's any kind's of food. No matter what high class and talented chef it may...

Nothing satisfies his stomach. No human food is able to do so.

Today is another cool midnight. The moon is beautiful. Yet his mouth is drooling.

He didn't pay attention first. How his sense of smell was different.

Whenever his servants were too close to him as they serve and babysit him. They smell so nice. At first he thinks it is puberty, you know the urge to devour some girls. But no. He also feel this insane wanting thoughts with guy's too.

'What is this...?'

It is completely different from what he thought this sensation lurking inside him was...not lust but hunger.

Muzan is becoming crazy again.

Ever since June 3rd, his parent's has not visited him. They had some kind of political meeting's and govern stuff's that Muzan did not existed again. He hated to be unnoticed and unappreciated.

Muzan whose staring at the full moon wipes his drooling mouth and went back to bed.

But then, he couldn't sleep.

"..So hungry." Muzan rang the bell on his room. A signal to call some servant to serve him. "Coming Muzan-sama!"

A reply from outside his room.

((Hungry,hungry,hungry.))

The voice on the back of his head echoes the poisonous and tempting act.

The Japanese door slide open, there were three maid's available. "What is your order Muzan-sama?"

Muzan is...staring intently to them. One of the maid had blush though. Because Muzan is good looking after all. 'Hmm..Maybe this is the solution? Should I test this feeling's inside me..?'

Every time he sees a human, they smell nice.

Maybe they taste good?

Muzan cleared his throat and responded, "Close the door and come closer."

The servant's were a bit surprised. This is a strange request. Usually Muzan will tell them to get out of his sight.

"Understood." One of the maid closed the door. Muzan had a plan, he wanted to taste them.

"Come here~" he said in a suave tune, the maid that was told had a big red face. The other two maid begun thinking that maybe their Master wanted to be an adult now.

"O-ok." Muzan who is finally close to the blushing maid. His fingers traveled to her hair and he sniffs at it. "M-Muzan-sama?!" Only making the maid panic.

The two maid whose watching also started to have a red face. They thought Muzan wanted to eat the moonlight with them.

"The moon is pretty tonight~" lifting the chin of the girl, "don't you think~?" Seductively he ask. If you say the Moon is beautiful in Japanese old times, this is considered as a love confession.

That made the maid's heart beats fast now. Their lord is planning to taste them!

"Y-yes...?"

Muzan leaned closer.

The girl closed her eyes and the other two started to cuddle close to each-other. They are embarrass they had to watch this!

Muzan licks the maid's face and then her lips. The maid moan in process. However Muzan's head were in ecstasy. 'What is this..? In my tongue, her skin taste like chicken?'

He embraced the maid and kept on butterfly kisses.

The other maid's fully closed their eyes to portray how shy they were.

When Muzan kissed the maid, the maid opened her mouth. Muzan, who is not aware his tongue can extend so long. A deep french kiss, the victimize servant finally realize something is wrong.

This is not sex.

Because-

BITE.

Muzan eat her tongue.

The maid chokes at her own blood...eyes were in terror as Muzan, the heir lf this kingdom looked like a monster. Muzan is chewing her tongue. 'Wait...aren't tongue suppose to be...in my..mouth...?'

The maid lost her tongue. She screamed in horror as blood flowing out of her mouth. "Ahh..ahh...MAAAAH!?"

The two maid open their eyes to see Muzan devouring the girl. Literally eating her, nlt in a sexual way...! They also screamed in fear. "Kyaaah!?"

Muzan hand's extended to punch them. So hard they splat.

Muzan feasted onto their corpses.

That night Muzan's empty stomach became full and satisfied. "Ahh~ I see. Human's are my food...because they are nutritious." Delighted on this discovery.

...Next morning, his parent's happen to visit him. Finally.

Only to witness he is eating one of his servant's ,as if he is sipping a tea and chewing a Mochi.

"Hmm~? Oh, Mother, Father...Welcome back." He smiled with bloody fingers, lip's and glowing red orbs.

His Mother and Father realize the change's of their son is not normal. If this is a side effect of the medicine. This is demonic.

"Muzan what have you done...?" His father pointed at him, Muzan still eating though. "The maid...you ate them...?" Is the billionaire question.

They were terrified of him. Muzan saw it in their eyes.

"Aahh! DEMON! YOU ARE A DEMON!" Is the hysteric scream of her mom.

Muzan's eyes were widen in realization what he has become.

"Am A Demon?" Taking a glance at his bloodied hands. Instead...Of crying in regret. Muzan had the smoothest smile.

"That is wrong, Mother, Father~" he made a declaration. "For Am A King."

Demon King.

Muzan had reach his 28 years old age. However he remained looking young. His Parent's, he threatened to eat them if they will deny his existence as how they had always been.

Muzan told his parent's he will not eat them, he just needed disposable servant's as his meal. Problem is, it is starting to become hard to hide the fact that their son is a demon.

So Muzan was desperate to find the Blue Spider Lily his doctor mention. So that he can be human again. He wanted to do so many thing's. He did not want to die anymore.

"Never again."

His parent's helped him to find it but, no result.

Until the day his parent's had fallen ill. Muzan was afraid. Afraid that he isn't really healed. He is running of time to pretend normal.

He had not walk side by side with his parent's in the sun for a stroll.

His dream is shattered.

This is the first time Muzan discovered he can turn someone into a demon.

His father and mother, he converted them as demons. Muzan became the new Emperor. He ordered all slaves to be his and they mysteriously disappeared, every-time the Moonlight is beautiful.

People had started thinking why.

However some old people had rumors that they were demon's. Kibutsuji is a blood of demon's. Pointing at Muzan the heir, the new Emperor.

All the servant's husband,wives, friend's and relatives and parent's decided to pick up weapons. These people were related to the maid's he had devoured from previous.

These people formed an alliance and called themselves the Onigari, some wealthy family aided them. Muzan did not know it was the Ubuyashiki clan.

They invaded Muzan's castle.

His parent's were killed by a mysterious samurai blade, called Nichirin.

Muzan had run away and cursed the people who dare to take vengance on him. 'They are just slaves! My food!'

Muzan knew tonight, he cannot be Muzan anymore.

He learned he can shapeshift. He changed his name.

He blended with people. He did what he wanted to do. To have friends, get a lover and be appreciated.

However he felt empty and detach.

He was just acting kind so that no Demon Slayer will locate him.

"Nobody will kill me. I will find the Blue Spider Lily and Conquer the sun!"

He thinks he is a perfect being. Chosen by gods.

Before Muzan notice, he had outlived more than his twenties.

The Heian Period ended in a blink of boredom he felt.

It is now Kamakura Period.

He made a lot of people as a demon. He is no longer the owner of this land. He kept low profile.

He made some minor demon guard. Calling them Moon's, he ordered them to search him the mysterious Blue Spider Lily, while he keeps himself safe from the sun and slayers.

Muramachi Period.

Muzan met a lady with serious illness despite being a doctor. He tricked her to be cure if she become's a demon. This lady named Tamayo eat her own family and is forced to serve him for a cure to overcome the Sun.

Nanbokucho Period.

He found out giving more blood to his demon's makes them stronger close to his level. He now named them as Lower Moon and Upper Moon, while Tamayo is her personal assistant. Also Muzan was taught by Tamayo the different kinds of Blood Types.

It seems Marechi is a rare and delicious blood.

Eating is just eating. Muzan never really give the damn of what were it's difference. Just like how he used to consume random medicines given by his doctor's medicine's.

Sengouku Period.

Muzan encountered the man that had scarred him.

Yoriichi Tsugikuni A member of the Demon Slayer Corps with a weird swordsmanship. He called it the Breath Styles. It is the first time Muzan heard such ability of a Slayer.

He feared the Breath of Fire.

Aduchi Period.

Muzan is now threaten when he heard Pillar's were learning from the Hanafuda Earring's teaching, he decides to collect Marechi's and demand his demon's to kill more slayers.

Edo Period.

Still no spot for Blue Spider Lily. Tamayo is nowhere to be found.

Bakumatsu Period.

Muzan did not notice he himself had become a fully emotionally detach -heart, ruthless and exceptionally intelligent. He had perfected the double-faced nature. He is searching for Tamayo or any other doctor that could help him. Failed.

Meiji Era.

Muzan just now discovered, the leader behind Demon Slayer Corps was his long distant Relatives the Ubuyashiki. Apparently they were cursed by him. Which, he doesn't give a single drop of his hair.

Finally the Taishou Period.

Kagaya Ubuyashiki had the most promising Pillars it seems. Muzan named himself Tsukahiro and married a woman name Rie under his surname Kibutsuji.

The memory skipped to his final moments.

His final moments as he was burning by the sun, Muzan showed a much more vulnerable side to his personality as he slowly disintegrated to ash and lamented on his life and choices.

Revealing that Muzan's desire for "life" and his near constant struggle just to breath as a human, constructed his obsessive ambition to survive, and he truly felt vulnerable whenever he was reminded of his human frailty because of it. Even on the brink of death, he is still utterly unrepentant in his actions of killing, murdering and eating humans for a thousand years and has even stated that as he died, he could not remember a single person he had killed.

The words echoed...

(("Tanjiro I entrust to you my dream since Ancient Time's. Show me...the Sun. You Are my Only Hope., The Moonlight meet's the Sunlight, Atlast~"))

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Tanjiro opened his eyes...He was in the abyss, teary eyes. The place where he would have a chat with Muzan. The albino man who always held him close. Not realizing it was holding him captive from the curse of becoming a demon.

Tanjiro doesn't care about that, what disturb him were the man's memories.

It felt lonely.

"You...You have never walk to the sun." he said, Muzan whose looking down at him were playing the strand's of his hair, hands that eventually traveled to his Hanafuda Earrings. The man in his late 20's seems to have a fascination on the earrings. Same time, there was a vile of hatred lingering.

"Tanjiro~" he said in a husky voice. "What are you saying?" a deep chuckle. "Seeing you being able to walk to the sun, Is a dream come true."

Yes, Muzan decided to pass this 'dream' to this boy. This boy who had always walked in the sunny spot, but he forced to be part of Tanjiro.

So whatever Tanjiro sees and feels, Muzan will be able to experience it.

This is what he meant to be part of Tanjiro, Memories are Eternal.

The man wipe his teary eye's softly."Muzan...I," there was a hint of pity in Tanjiro's weak voice. Muzan decided to put his finger's on those lips. "Shh~"

To silent him. Muzan does not want to hear it. Tanjiro displayed the empathetic face. This face he usually show the demon's during his Demon Slayer Life.

"Tanjiro~ Smile for me will you?" This isn't a friendly bonding. Muzan just hated how Tanjiro is acting so weak. He should become like him, elegant and powerfu. Muzan is a manipulative beast remember? "As a King, never show them your weak spot~" this is partly a Muzan in good mood as he succeeded to Erase the thoughts about Nezuko.

Tanjiro nodded in obedience. He feel's sorry for this man. Still not recalling this Muzan is actually his mortal enemy. Tanjiro smiled for now. "Alright Muzan. Talk to you later!"

Chain sounds...

"Uhh...?" Tanjiro woken up. Muichiro is by his side. "Tokito-kun...Where is Rengouku-san?" A little bit sleeply.

Muichiro replied in a very sweet way. "Hehe, Kyoujiro went out to eat." Muichiro's demon eyes are weird, those spade icon in his pupil were brighter whenever he is with their creator. "Tanjiro-sama, I will work harder! I will be the first to get you some Marechi~!" For him it is a competition. That role.

However, Tanjiro frowned at him. "Is something the matter, Tanjiro-sama~?"

SMACK!

Muichiro is shocked. He got headbutt. His head exploded by that act, as he is regenarating, Muichiro remembered what makes Tanjiro angry.

He forgot Tanjiro had a very sensitive sense of smell.

He kinda...did something awful before he got here, that scent linger's longer, if he killed too much.

The smell of void, the blood.

"From your smell, you eat 5 people aren't you?" That questioned hinted dismay. Muichiro's head went back and he bowed to the floor right away.

Tanjiro is reading him. "F-Forgive me Tanjiro-sama! I got...carried away-"

Tanjiro lifted his chin, Muichiro shivered, those plum red eyes were threatening yet charming.

"Muichiro-kun~" The ex mist pillar gulps down, Tanjiro call's their real name when serious, angry, upset or disappointed. Muichiro whose obviously nervous he had upset their lord. "Tell me,where did you do this~?"

Mucihiro gave him a sad honest answer as he shook's his head."In...Kumotori Mountains..." like a guilty chiauau." I See," Tanjiro pat's his head in return.

'He is not angry anymore..?'

He dared to gaze up, finally Tanjiro had his forgiving smile.

"Good...~" acting like a Big Brother praising a little brother. Muichiro's love-struck went back. "T-Thank you for your kind w-word's" feeling a bit shy.

Tanjiro decided to break the chain's that bind's him in bed. -SHATTERS-

He stood out of his bed. Muichiro followed him with an airhead look. "Are you...going out again?"

Tanjiro flips his long red hair, in a manner for you to see his desire to go outside.

"I'm gonna visit Kumotori Mountain myself. So do not tell anyone~" winking. "Understand Tokito-kun~?"

Muichiro just okay-ed while overjoyed for the attention of Tanjiro.

"Y-yes Tanjiro-sama, have a safe trip~!"

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Same time...Giyuu is on his way to investigate the Kumotori Mountain, the place Tanjiro had grabbed his clothes, is Nezuko's story. The crow reported a certain man named Saburo, whose wife and child rumored to be dead were alive again. Oyakata Sama ordered him to investigate as it seems to be a clue where about's Tanjiro's hideout could be. And since they already know the secret that these are Demon Incident's.

Giyuu is not willing to be late.

"Am looking for a Man Named Saburo, do you know where he lives?"

A passerby looked at him up and down, Giyuu is somewhere the rocky mountain path. He is uphill. "Ahh, Saburo...hmm," getting impatient of the old man not responding right away. Giyuu bowed. "It seems you do not know, Farawell-"

"Ah! I remember!" Staring. "Saburo is the nearest neighbor of the deceased Kamado Family! Up the mountains, you can start now before dark."

'Does this mean...Tanjiro is concious during the pass 2years...?'

Giyuu is curious for more. "Thank you." Another bow he left and started walking faster, until he is now running for it.

His somewhat jogging become slower when a small snowflake fell onto his nose.

"This is..."

Winter.

Winter is, coming.

To be Continued

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Kanon58: i based Tanjiro hot head during his feral state lol. did you enjoy this chapter? I put all my effort for Muzan-sama. The reason Muzan is able to bare the 6days hungry mood is...becuz he is used to it, not eating properly is part of being sick (i relate lol). And we can see he is a well educated person, he wont go feral that easily unless you call him PALE or look DEAD. He cant be king of demons if he is feral right? Plus I want to display how Muzan had no desire of love lol...he loves himself only.

That's a Fact.

Also He needed more spotlight. So hope you guys liked Muzan's past. I did a lot of research. The Tamayo theory what period she came from, i'm not good at math but wiki said she is like 400+. I assume that is nearing Sengoku Era lol. And yes there is ships, this is still a fanfic.

Zenitsu x Nezuko

Aoi x Inosuke

Kanao x Tanjiro

And some fanservice for Muzan x Tanjiro x Giyuu pff...

Also of course, Shinobu x Giyuu vibes, Obanai x Mitsuri.

HEY DO NOT FORGET, DROP A REVIEW! I LUV REVIEWS! make my day too! Tehe! xDD

Next: Tanjiro is being worship by some people who were glad to have their loves ones back even if they are demons in disguise of still doll expression. He got referred as a Sun God. Taiyo No Tanjirou refuses to drink blood except Marechi, that will change his encounter with Tomioka Giyuu. Tanjirou becomes sadistic.