It was created using the world view of Shinobi Kill.

Mako, a second-year middle school girl who committed suicide in despair, was possessed by a ninja spirit and returned to the world. The ninja spirit, which had been dead for more than two thousand years, returned to the world with a strong desire for revenge. It lurked in the girls' school and continued to accumulate its power of revenge. In the explosions and fires, it vowed to kill all the ninja spirits in the world.

The ancient book "Ninja Words" records that when the world returns to the end of the Dharma, ninjas will resurface and bring about a dark and brutal rule. However, there is still a glimmer of hope that new ninjas will emerge from among the mortals to rise up in rebellion.

Now, deception, oppression, and exploitation are gradually filling the world. Ordinary people live in a false and manipulated life, ignoring cries for help and refusing to fight back against violence. Their blood and sweat are being slowly devoured, yet they remain oblivious. Once again, the world is heading towards the end of the Dharma.

Transmigrating into "Swallowed Star," I became a martial artist a few months before the Great Nirvana and awakened my spiritual power, only then discovering the true nature of this world! A special opportunity led me to the path of a beast tamer.

[Configuring Windows Update... 99%... Please wait] ...My name is Hiroki Sawada. I'm 10 years old and a time traveler. After crossing over, I live in an ordinary residential area in the Hidden Leaf Village and am unmarried. I attend the Ninja Academy and return home no later than 6:00 PM every day. I don't smoke and have no interest in alcohol. My favorite drink is Fat Otaku Sparkling Water. I'm currently a student at the Ninja Academy, excelling in theory and reasonably good in physical skills. I go to bed promptly at 9:00 PM every night and get a full eight hours of sleep. Before bed, I do 20 minutes of yoga to relax my body. Once in bed, I fall into a deep sleep. I sleep through the night, never letting fatigue or stress linger until the next day. Doctors say I'm normal. Of course, I'm only saying this to let you know that I don't have any lofty dreams...

This is a world of swords. Beautiful women, magnificent swords, and romantic tales. Xu Qing transmigrates to this world, but is not a swordsman; instead, he's an angel investor in the world of chivalrous heroes. This is the story of an unconventional swordsmith (just kidding), who travels the world selling the swords he forges!

[Refreshing story + reincarnation + cheat system + no female lead]

Apocalyptic world... Wuxia... Cthulhu...

Chen Tian has been in this world for 18 years and has obtained the Infinite Reincarnation System (cheat version).

Each time a character is reborn, they can randomly obtain a cheat program.

—Apocalyptic World: Cheat, forced purchase. As long as you have enough energy points, I can buy you regardless of your consent. Even if you die, all your attributes and talents will become my property.

—Martial Arts World: Random items, random prices. Any item will be randomly refreshed on the panel. It may refresh a nuclear weapon for a copper coin or a herb for 100,000 gold.

When Chen Tian finished his reincarnation, he discovered that the cheat codes he had used for each reincarnation were saved in the cheat code book.

Later on, it can be directly redeemed.

...

This world has gods, immortals, and indescribable beings.

The martial arts are in decline, almost extinct; the Shinto is glorious, the demonic way is sinister, both are high above.

Fang Yi traveled through time, opened his eyes to see the world, and became a warrior in a small place.

Fortunately, he acquired a unique ability, that is, no matter what martial arts he used, they would automatically mutate into poisonous skills.

The more martial arts you practice, the stronger the poison in your body.

Shinto? Demon? I wonder if you can stop my poison?

What do you mean by martial arts?

My poisonous palm can corrode everything in the world, invade the mysteries of the sun and the moon, and wherever it passes becomes a dead zone, and whoever it touches becomes dead.

Please taste it, all the great masters of the world!

Unexpectedly arriving in the world of Naruto, Uchiha Chiren desperately trains to save his life. He nearly escapes assassination after calling Danzo a eunuch and is sent to the battlefield as cannon fodder. Fortunately, he awakens a system that allows him to choose an ability from his opponent after each battle. [I choose Uzumaki Physique] [I choose Spirit +1] [I choose Constitution +1] [I choose Eight Gates Ninjutsu!] [I choose Flying Thunder God!]... Initially, Shimura Danzo was ecstatic, hoping this second battle would end Uchiha Chiren's fate. Unexpectedly, all his previous machinations proved ineffective, and Chiren even managed to activate his Mangekyō Sharingan. Years later, Chiren stands in the Hokage Building, addressing Shimura and the Sarutobi clan below with a hearty laugh. "Shimura Danzo, Sarutobi Hiruzen, this is your teacher, Senju Tobirama, right? Look! Today...

[Starting in Huangfeng Valley + No System + Harem + Growing Up with Han Li + Decisive and Ruthless + No Level Suppression] Transmigrating to a mortal world, without the Little Green Bottle, can one become a savior revered by all? Yes! Han Li has the Little Green Bottle, and I, Fang Yun, have the Myriad Manifestations Bag. Precious magical artifacts, magic treasures, heaven-reaching spiritual treasures, innate profound treasures, etc.—as long as you obtain one, put it into the Myriad Manifestations Bag, and you'll have countless more. Thousand-year-old spiritual herbs, ten-thousand-year-old spiritual herbs—put them into the bag, and they'll be produced endlessly. Talismans, pills, mineral materials, formations, magic treasures, etc.—all can be copied! This item isn't just for herbs; it can even copy rare minerals and fragments of magic treasures! In a sense, it's an enhanced version of the Heavenly Palm Bottle! ...Many years later, in the Void Heaven Palace. The struggle for treasure reached its final stage. Xuan Gu Shangren, relying on his supernatural powers, suppressed Han Li...

This book is also called "Soman: The Demon King Who Started the Naruto World"

[No system + multiple worlds + no qualifications to become Kamen Rider + multiple heroines + Demon King + OOC apology]

My name is Tokiwa Sougo, but I am not the little devil king, nor the old devil king. I am Tokiwa Sougo who traveled to the world of Naruto. I had no inheritance and felt that my life was over. But when I was just five years old, my complaints were heard by the old devil king, and I got an unexpected inheritance.

Tokiwa Sougo: I'm not a knight, I'm a demon king.

【Marvel】【Superman】【Invincible at the start】【Decisive in killing】【No abuse of the main character】

Arno Stark.

Some people call him the God on Earth.

Some people also call him a devil on earth.

But he doesn't care.

Be it God or the devil.

If I possess the power of Superman and still care about what you say, then wouldn’t I have become Superman in vain?

A tall figure in a black battle suit stood high in the sky, his eyes shining with crimson light.

Below are countless worlds that surrender to his iron fist.

Marvel, DC, Black Robe, Resident Evil, etc.

(The introduction is weak, but the content is absolutely wonderful. I hope you like it.)