To protect his childhood sweetheart, the naturally insightful Shihouin Suqiu resolutely chose to join the Demon Slayer Corps and become their hidden ace, the Shadow Pillar. All tragic endings will be changed. No one will be hurt or cry anymore, because I'm here. "Muzan, didn't you say that those you hurt were merely experiencing natural disasters? I am your natural disaster."

On the night of Kiritsugu's death, Shirou fell asleep and woke up to a new world.

There are ghosts here, and there are swordsmen who kill ghosts.

From now on, partners of justice are no longer a borrowed slogan!

But it is a creed that you carry out throughout your life!

Ghost King, give me your life!

Infinite Holy Grail War?

Run through every one of them!

Lin Guang travels through the world of Demon Slayer and awakens the Super Treasure Chest System! In Demon Slayer, slaying demons unlocks treasure chests; defeating the navy and celestial dragons unlocks treasure chests; and defeating enemies unlocks treasure chests in Naruto. Thus, Lin Guang continues to unlock treasure chests, conquering the world!

[No Sword] + [Standing Ghost] + [Salted Fish] + [Jade World] + [Dakimakami]

What is it like to travel through time and space and become the son of Wuzhan Wuzhan?

Kenjin did it, traveled to the world of Demon Slayer, and became Muzan's son. It seems that his biological father is still Tsugukuni Yoriichi.

Jianren: "Mother...I want...to drink milk!"

Wuzan: "Little thing, dare to disobey my orders again!"

"I'll let you experience what hell is like."

When Ji Guoyuan saw the same pattern on Jianren's forehead, he was stunned.

"Uh...why does this kid look exactly like me when I was younger?"

Tamayo stroked her bulging belly.

"How can you... be Muzan's child ಥ_ಥ"

Duji's eyes were filled with tears.

"Young Master...I also want a child."

Having a son and a daughter, so happy

My wife, my children, my warm bed, my name is Jianren

A boy named Uchiha Mei lost his parents to demons when he was ten years old. He met the Flame Pillar, Rengoku Makijuro, and became his disciple, possessing extraordinary talent. He formed a bond with the Flower Pillar, Kocho Kanae, becoming Tanjiro's teacher. He arrived in time to fight Child Demon when Kanae was attacked. He instinctively killed Child Demon, but Kanae was seriously injured. To ensure Kanae's safety, he inadvertently allowed Child Demon to escape. He later became the Fiend Pillar.

After becoming Douma, why did he still follow the same old path as in the comics?

Oh no, this won't do!

So Douma decided to become a heartthrob.

Akaza-dono~ Let's go watch the fireworks together! Look, look, my newly developed abilities are all in the shape of love~

Kokushibo-dono seems like a lady from a noble family, cold on the outside but warm on the inside, sometimes his enthusiasm is really annoying~

Just cut Hantengu-dono into four pieces, and you can have fun playing with him!

Dakimaki-sister, I'm the most popular courtesan in Yoshiwara Yuukoku~

Muzan-sama is still full of life today, so comforting~

Picked up a cute little butterfly, and it's the most fun to use it to tease the big butterfly!

You're disliked, Giyu-kun, let me teach you how to be popular~

Wear your women's clothes, maintain your ladylike manners, and don't speak~ Pig.

Ghosts & humans: (╬▼皿▼)

A young man from the modern era travels to the Demon Slayer world and becomes the descendant of Tsugakuin Yoriichi – Tsugakuin Najo. The protagonist is born with markings and natural transparency. There are two female protagonists (guess who they are): Muzan: "Don't come over here!" Kokushibo: "Come on, you will finish Yoriichi's unfinished duel!" Sango: "The ultimate battle!" (Slightly altered plot) (This book is not a cool novel; just having markings and transparency doesn't mean you can easily kill an Upper Rank! It's a coming-of-age novel.)

Ever since the Breathing of Fire was developed during the Warring States Period, more than 80% of the Flame Pillars have carried the name of Purgatory.

Even Rengoku Kyojuro, the last Flame Pillar of the Taisho period, gave up his own dawn for the dawn of others.

But if history diverges,

That one,

It keeps growing upwards,

The flower called "Purgatory"

Inadvertently, a fruit was born, but it was helplessly abandoned. Who can guarantee that it will sprout again as a seed in the shade and grow in a deformed form...

Or will it just be a fallen petal, transforming into nutrients to dedicate itself to the growth of future generations...

(I write simply because I feel like writing. My writing may not be good, and the updates may not be on time. After all, I am also a quasi-working person.)

What if you encounter Muzan at the start and become a demon? Before you lies the demon who doesn't eat humans, the heir to the Forest Breathing, the Pillar who strikes fear in countless demons, the honorary founder of the Butterfly House, a staunch supporter of Dorayaki, the poop-scooper of Shiba Inu Enji, the idol of the male and female members of the Demon Slayer Corps, and the trusted senior of all the Pillars: the Forest Pillar - Moriki Shinichi! [Not a system! Not a cool story! Growth-oriented! Single female protagonist! Don't read if you mind, the author is sensitive, so please don't criticize if you don't like it.]

(Pseudo-invincible + female lead Shinobu Kocho + system runs away at the start) Shimotsuki Mirai transmigrated to the present day and has spent her childhood wandering around the forges of the sword-forging village, the clanging of hammers the lullaby of her life. The blacksmiths always said this child's eyes were too still, as still as a quenched blade, unaware that the vermilion burn marks on his palms, shrouded in years of wear, concealed an astonishing power no less than that of a Nichirin Blade. When he first met Shinobu Kocho, he only felt a stinging pain in his eyes. Before seeing the girl, all his information about her came from the precious little black box he couldn't bear to part with in his previous life, but now, the person from his dreams stood before him, more vivid than any description. The girl blushed, staring at the light dancing on his fingertips, asking if he was a deity descended to earth. Kanae leaned against the door, chuckling softly, "Such a wondrous boy is hidden in the sword-forging village." Looking into the clarity in the girl's eyes, Shimotsuki Mirai suddenly wanted the sword in his hand to protect that light a little longer, just a little longer...