[System pays for life][Exhilarating combat][Thunderous][Growth]

When Yasui Ryosuke is transported to the world of Demon Slayer, he is devastated.

Good news: He is familiar with the original work and knows the plot.

Bad news: The original owner was a sickly person who was not long for life, and the only cheat was the double-dealing system that required spending a lot of time and effort to become stronger!

"You mean killing demons grants you lifespan, which can then be used to enhance your breathing technique and sword skills?"

Yes, that's right~

How much longer can I live?

[Congenital liver failure, at most one year, haha~]

"Fuck your sister!"

Yasui Ryojie was angry.

What kind of good system would make a cancer-stricken host risk their life?

Knowing the original plot, Ryosuke would never willingly seek his own death by joining the scoundrel Muzan.

If that's the case, then kill!

Kill them until the sky darkens...

I have been reincarnated as a miserable boss. I don't want to be a good person or a bad person. My ghost life is long and I just muddle through. My biggest hobby is collecting the complete illustrated collection of the Twelve Demon Moons and the Demon Slayer Corps.

What is this?

What is this?

What is this?

Oh, this one can't be collected

Wang cried, and Muzan's dream of a complete illustrated book was shattered

[The male protagonist has no CP, and has a filter for all the characters. He can save people and be a saint, but he can also kill and eat people. He is not a good ghost, a double standard monster]

The protagonist has no CP+no system+crazy+funny+daily life

Ye Yan traveled through time

Bad news, she traveled to the world of Demon Slayer

The worse news is that she traveled through time and space to become the boss

Even worse news, this ghost king is hard to kill and she is afraid of pain.

The good news is that it is still the Heian period, so there is a lot of room for maneuver.

Forget it, if he can survive, then live. If he can be saved, then save him. If not, forget it. The worst that can happen is just a fatal blow. He is just a pervert who likes to play badly.

Let your subordinates conquer the world for Todai?

"Healing" each other with Tamayo?

Teach girls modern music?

Sailing to Antarctica and erecting monuments everywhere?

Overcoming sunlight and wisteria?

Accept Jiguo’s brothers as apprentices?

Still having fun with Zhu Houzhao?

This is too much of a mess.

The power of the plot plus the spirit of the scumbag boss? What the hell is that? A rebellious spirit has emerged.

Having transmigrated into the world of Demon Slayer, Mugae became Muzan Kibutsuji's adopted son and became Kokushibo's apprentice to learn Moon Breathing. The young prince Mugae declared that with this identity, he could roam freely throughout the entire demon world!

Muzan Kibutsuji: He's such a filial son, I'm dying of filial piety. I never want to kill his father with Tamayo.

Domo: I treat Wuya like a young master. The young master always wants to treat me to wisteria flower tea, and he also likes to take me out to bask in the sun. He's so considerate!

Jade Pot: Young Master Wuya is a hypocrite. He says my pot is asymmetrical, but secretly he sells it for money!

Naruto: With Young Master Wuya's praise and recognition, my flute playing skills are getting better and better!

Lin Guang travels through the world of Demon Slayer and awakens the super treasure chest system!

In the world of Demon Slayer, treasure chests will appear as long as you kill demons; in the world of One Piece, treasure chests will appear as long as you defeat the navy and celestial dragons; in the world of Naruto, treasure chests will appear as long as you kill enemies.

So, Lin Guang continued to open boxes and conquer the world!

Si Jinkun, who traveled to the Demon Slayer world, shouted at the beginning: I don’t want to be a human being anymore!

He went completely crazy after arriving in the world of Demon Slayer

That shadow that has lingered for a thousand years—Muzan Kibutsuji! That pitiful creature who cowers in fear because of the curse, that false king who vainly seeks immortality!

All his struggles and blood ghost arts became futile jokes in front of Si Jinkun's ultimate body that combined the curse of the stone ghost face and the essence of countless ghosts!

He treats Wuzan as a high-end bun

It also forced the demons and the Demon Slayer Corps to join forces for the only time in a hundred years.

Many years later, Si Jinkun, who had already become a JO-level creature, looked at the world he had ruined and fell into deep thought.

Lin Yan traveled through time and space in the blink of an eye. He traveled to the world of Demon Slayer, to the body of a dying beggar. The wind was freezing cold, and Lin Yan had no strength at all. He could only huddle in a corner, feeling the vitality in his body gradually disappearing in despair. As a traveler, he even had the golden finger [a system that can make you stronger by eating], but he had no chance to use it. After all, the reason why he fell into such a situation was because he had nothing to eat. At this moment, a pair of slightly immature hands full of wounds pulled Lin Yan up.

Chiyo Gen, a good citizen of the Three Good Citizens, was forced to work by an unscrupulous two-dimensional god. What is the two-dimensional god?! Fall orz. In short, under the strong request of a group of two-dimensional believers, I, an ordinary [actually not ordinary] Yokohama nanny gloriously traveled through time. Although there is a system with no bottom line, in short, I became a genius in the eyes of the wooden pillars of the Demon Slayer Corps, including but not limited to creating the Breathing of Wood, becoming the darling of the Butterfly House, and being forced to marry by Fuzukawa. "Ahhhhhh, I told you it was an accident, don't come over." Everyone in the Demon Slayer Corps: Ahhhhhhh, kiss me, kiss me, why don't you kiss me! Fuzukawa, we hate you.

When I woke up, I found myself as Nezuko Kamado!

Seeing the horrific scene before me, on the verge of annihilating my entire family, I was filled with rage!

What delicate little sister?

In this life, I hold the script in my hand, and I crush the bamboo tube in my teeth!

The game starts with awakening the Sun Breathing technique and the Transparent World. Tanjiro, step aside! Muzan, you old scoundrel, take this [Flash Dance]!

Shinobu Kocho: Something's wrong with this kid!

Yiyong: ...Water? I'd rather not learn it.

Purgatory: Hmm! What spirit this young lady possesses!

To change the tragedy and beat up the scumbag boss, in this life, I, Nezuko, will slaughter my way through the Infinity Castle!

Travel through Demon Slayer and merge with Muzan Kibutsuji!

Reorganize the Twelve Demon Moons, run rampant in Tokyo Prefecture, and terrorize Japan!

End the Demon Slayer Corps, liquidate Ubuyashiki, and aim at Taisho Tenkō!

Strategy of thousands of ghosts, swallowing the world, only I am Yue Yan!