Official Introduction: Now approaching you is: Muzan's nightmare, the destroyer of the Twelve Demon Moons, the head of the Infinity Castle demolition office, the most righteous person in the Demon Slayer Corps, Sabito's savior, the eternal absentee of Kanae Kocho's tea party, Giyu's good senior brother, the founder of Fist Breathing, and a grandmaster.

Willow branches provide shade, that's it!

Kanae Kocho: "I invited him to a tea party ninety-seven times, and he refused ninety-seven times. He's so gentle."

Shinobu Kocho: "Why should I be trained by iron fists? It's infuriating, sister!"

Akaza: "A powerful person, the best in physical combat."

Muzan Kibutsuji: "A monster who destroyed all my Demon Moons with his bare hands and blasted the Infinity Castle to pieces, you call him human?!"

Unofficial synopsis: Yagyu In transmigrates to the world of Demon Slayer, but the system believes he is in the world of One Piece and identifies him as a Marine.

You can earn Navy Points and rewards by doing things that are in line with the Navy's rules.

Yagyu In: No, buddy, is this right? Where did this pirate from the Demon Slayer world come from that I need to catch?!

Pirates are attacking! Strike immediately to capture or kill them!

Looking at the man-eating ghost before him, Liu Shengyin realized that the system had gone mad.

From then on, the Demon Slayer Corps had one more instructor who liked to smash people's heads with his iron fist of love.

This book is also known as "Left Fist's Overpowering Entanglement Deals High Damage, Right Fist's Overpowering Entanglement Deals High Damage," "Three Punches Shatter Evil Spirits, Sir, I'm Just an Ordinary Person," "Overpowering Aura is Also Qi, and Qi is Breathing Technique!" and "Muzan, Are You Hiding Well? The Marine Admiral is Coming to Get You~"

Note: This book is a crossover anime/manga series, and will later explore other worlds.

Suibian! A young man with a very casual name, living a casual life. Then, he was casually killed by a flower pot, and thus entered the world of Demon Slayer! He became Tokito Muichiro's older brother, Tokito Ichiro! From then on, his life began to be more than casual...

[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...

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.)

Kotoji Mirai transmigrated to Soul Society and became a carefree, lazy bum in the 9th Division. Unfortunately, his salary wasn't enough for drinking, so he resorted to writing novels for the *Seireitei Newsletter* to earn extra money. His first novel, *The Arrogance and Loneliness of a Prodigy*, featured the protagonist "Aikawa." The next day, a junior named Aizen Sosuke, with a gentle smile, came to ask him about the profound meaning of the "Throne of the Sky." His second novel, *The Murderer of Meteor City*, featured the protagonist "Shuka." That night, the gentlest captain of the 4th Division, Unohana, sat in his room with a sword, smiling as she asked him: "What is the meaning of 'the loneliness of a mad beauty'?" Kotoji Mirai was now panicking, currently writing *The Invisible Empire Hidden in Soul Society*. Would he end up killing off his own people? Kotoji Mirai discovered that, without realizing it, he had acquired the title of "The Most Beautiful Nobleman in Soul Society." "Isn't this going to kill me?" He drew his Zanpakuto, unleashing his true name, "Zhuiwen Banshou" (meaning "All Things Under Heaven"). "The future of Soul Society will be written by me."

[Intelligence system + urban slice-of-life + spy agents + multiple female leads]

Chen Yang lost his job, his father was seriously ill, and he couldn't afford surgery... He unexpectedly awakened the "Daily Intelligence System".

[Intelligence 1]: In half an hour, you will experience a car accident, resulting in the destruction of the car and your death.

[Intelligence 2]: There is an A-level wanted criminal in the neighborhood where you rent a room. The bounty is 100,000.

[Intelligence 3]: On the antique street, someone found a bargain at a low price and made a profit of 100 times.

[Intelligence 4]: The beautiful doctor is tossing and turning at night, and has developed wicked thoughts about you.

[Intelligence 5]: Evergreen Company, whose boss is a spy, poses a huge threat.

Chen Yang used intelligence—

Dating, catching spies, making money, raking in hundreds of millions.

A shadow spy from a small island nation died with his eyes wide open in disbelief.

"Impossible! I was born and raised in the Dragon Kingdom... How could you possibly see through this?"

The top assassin from India is in a panic:

"I've been hiding for three years without anyone noticing, how come I'm exposed the moment you arrive?"

A veteran special agent from the Dragon Kingdom looked helpless:

"Can't you be a little more discreet, kid?"

"You've caught all the spies and taken all the rewards, what are we going to eat?"

At a lakeside villa, a group of mermaids play and chat in the pool...

"Brother Yang, you're making money every day, you're already richer than a country, and you have so many sisters around you, don't you have any ideas?"

Chen Yang chuckled:

"Of course I have ideas... Let's keep making money!"

"However, money is hard to come by these days, so I'm planning to go out and earn some extra cash."

The beautiful King's ace spy, tears streaming down his face:

"Oh...shit!"

"You're making money, so why the hell are you messing with me???"

[Invincible + Everyday + Relaxed + Action-Packed + Substitute + Ten Shadow Technique + Asura Armor]

He was unexpectedly transported into his mother's womb and in the future, he became the twin brother of Gojo Satoru in Jujutsu Kaisen.

The two brothers, who both have six eyes, went down completely different paths in life from the very beginning.

Relying on his innate six eyes, he will eventually advance the Ten Shadows Technique to the Two-Element Shadow Technique.

The Demon Void adapts infinitely to all things, while the Jadoro perfectly reproduces all things.

Just because you can kill someone temporarily doesn't mean you can kill them forever!

Not winning now doesn't mean you can't win forever!

The future, wielding the strongest spear and the strongest shield, will dominate the world of magic with invincibility!

...

Lufa: Where's my armor?

Future: Here you go!

Su Nuo: I admit, you are stronger now.

The future: Don't forget, you are the challenger!

Lu Suo: In the future, I want you to be my devoted subject!

Future: Lu Suo, I will make you a dead soul beneath my halberd!

...

To you two thousand years from now: What's the use of guarding an empty throne? Come and protect me, stand up!

...

Note before viewing: Satoru and Shoko are a couple, as are Jaden and Riko. The rest are all male protagonists. The male protagonist has a strong villainous personality. If you don't like villainous characters or prefer Shoko as the female protagonist, please be cautious before entering.

...

The previous text has been revised, so please feel free to read it later. If you have any other questions, please feel free to comment and correct me. In the future, I'll only listen to your advice!

[Invincible + Villain + Special Curse Spirit Cook + No System + Slow to Warm Up] My name is Hannibal, usually everyone calls me Uncle Hannibal. During the day I am an ordinary uncle next door, but at night I am an elegant gourmet. My favorite thing is to find the right ingredients. Gojo Satoru: I used to think he was just a normal person, until he pinched my neck and punched through a mountain. Sukuna: I'm sorry, I couldn't satisfy you. You know more about curses than me. Fushiguro Shiji: What Tianyu Tyrant? These are nicknames given by acquaintances. You can just call me Xiao Shiji. Geto Suguru: I heard that you don't have any children. I want to take care of you in your old age, godfather. Itadori: Uncle Hannibal, your cooking skills are really great. Excuse me, are these barbecues pork? Hannibal, who was dealing with a real corpse in the kitchen, wiped the blood off his hands, gently raised his glasses, and said gently: "Eat more if you like. This is the ingredient I found with great difficulty."

[Spell Return + Twelve Talismans + Invincible Cool Text + Not a Saint]

Jiang Chenyan travels to the world of Jujutsu Kaisen and begins by activating the power of the twelve talismans. The Dog Talisman grants immortality! The Rabbit Talisman grants unparalleled speed! The Ox Talisman shatters all obstacles! Gojo Satoru: "I've never seen your technique before. It's very interesting." Jiang Chenyan wields the Dragon Talisman, and with a burst of flame, he blasts the special-grade cursed spirit into dust. When the twelve talismans are combined, even the curse king, Ryoumen Sukuna, will have to obey my orders!!!

At a comic convention, Otonashi unexpectedly encountered an adorable little octopus preaching, but made a sarcastic remark, and then found himself transported to the Naruto world.

Not only does it lack a system and bloodline, but it also has something resembling an octopus's mouthparts on its body...

The good news is that this thing can eat anything!

Whether it's animals, plants, or various elements, you can extract energy from anything you eat, and it can even strengthen your body and evolve your life level.

The bad news is that this thing replenishes what you eat...

Are the Sharingan and Byakugan strong? You'll grow as many as you eat!

Are tailed beast chakra strong? Then you probably wouldn't mind having a few more tails, right?

Are Devil Fruits powerful? Would it be okay to have more markings on my body?

In order to survive better, Otonashi has no choice but to forge ahead on an indescribable path of distortion.

Otonashi: "Don't let my usual respectable appearance fool you, actually I..."

gurgling sounds (tentacle wriggling sounds)...