Iron Man Tokiomi Tohsaka, Kiritsugu Emiya (father of magical girls), Kariya Matou (dark swordsman), King Arthur (who spews profanities)... Captain Uchiha Sasuke (Bleach), Naruto Uzumaki (Primarch), Sakura Haruno (true progenitor of the vampire clan)... The Marvel Universe, teeming with heroic spirits and visitors from parallel worlds; Digimon from the Pokémon world; a crossover world invaded by supernatural tales; EVA, where Ultraman descended... In each world, beings that shouldn't exist have appeared, bringing a worldview-destroying shock to the inhabitants. "Yes, I did all of this. As the Fourth Calamity, wielding the 'Funny' system and with the profession of 'Masked Fool,' it's perfectly reasonable for me to do things that make people's vision go black, right?" "What? You're asking what those people who saw another version of themselves in a parallel world and were driven to nervous breakdowns think?" "I think..."

What are Joan of Arc's three good points? Kindness, ignorance, and easy to seduce. Whether it's Black Joan, White Joan, Young Joan, Blue Joan, Red Joan, or whatever Joan of Arc is, they're all mine! What? You say there's no Red Joan or Blue Joan? They just look the same, so it's fine.

[Douluo Dalu Fanfiction, Silver Dragon King Gu Yuena wakes up early] He traveled to Douluo Continent and became the young master of soul beasts, Long Yitian, and was loved by all the beasts. He believed that the soul master's cultivation level was improved at the cost of hunting soul beasts, which was against the will of heaven and should not exist in the world. So he had the dream of destroying all soul masters and building a soul beast world, and fought for it. The first goal was to destroy Shrek Academy, Tang Sect and the three empires. The second goal was to destroy the profession of human soul master. The third goal was to kill his way into the Douluo God Realm, kill Tang San and other Shrek Seven Devils, and destroy all gods. The fourth goal was to establish a world of soul beasts. ...When a dragon claw that covered the sky and the sun smashed the Shrek Academy...

Once he traveled through time, Lin Bei came to the world of Hot-Blooded High School.

Awakened and activated the domination system!

At the start, he instantly killed the Ebizuka trio and dominated the first grade.

Then...

Defeated the Serizawa Legion and the GPS Legion, successfully reached the top and dominated the entire Suzuran.

But this was just his starting point.

His goal is to dominate all high schools, Fengxian, Guixie High, Ruanye...

Murayama Yoshiki: "I used to think I was a strong man, but then Lin Bei came."

Haiming Dawo: "Lin Bei will be the man I will look up to for the rest of my life."

There's a well-known Yorozuya in Tokyo. Its owner, Manjo Tachibana, is a strange man who only accepts commissions from interested parties. Yet, clients flock to the Yorozuya because its salespeople are all incredibly talented. ...Miyano Akemi: "I have a key. I hope you can give it to my sister." That evening, a group of Swat rushed into Hakubato Pharmaceuticals, solely to deliver the key to Miyano Shiho. ...Diplomat Tsujimura: "My wife has been acting strangely lately. Can you help me investigate?" Two days later, Manjo Tachibana, accompanied by Kuroko Tetsuya, handed the diplomat a stack of photos. "Mr. Tsujimura, our investigation indicates that your wife is suspected of having an affair with the renowned detective, Kogoro Mori." ...Matsumoto Yuriko: "My fiancé seems to want to kill me." Manjo Tachibana: "I have a plan..."

[Not a time-travel story, semi-invincible, starts with a love curse, gains the three-piece set of forward, reverse, and black flash, single female protagonist Shoko, magic ability: resistance manipulation, fast-paced alteration of the original plot]

My name is Wuji Nagi, and I'm really unhappy right now. Ever since I learned the truth about this shitty world, I haven't been able to find peace of mind. My biggest regret is making two friends who seemed reliable but were actually a complete headache.

Gojo Satoru: It's okay~ Anyway, I'm the~ strongest~

Xia Youjie: All non-magicians are monkeys!

Wuji Nagi took off her glasses, calmly made a "Sha" gesture, and silently pointed it at them.

Shoko Ieiri immediately hugged him: Calm down, calm down! They're friends, it's not that bad!

Sigh, for peace of mind, I can only keep getting stronger.

after...

Qi Hai: Senior Wuji is the senior I respect the most.

Yi Gu: I feel at ease every time Wuji San San arrives.

Haddock: I also want to become someone like Wuji San San!

other...

Lu Suo: That wretched Wuji Nagi!

Su Nuo: I'm so sorry I couldn't let you have your fill.

What to do when you're out at sea without a ship? Allen: "Steal someone else's." What to do when there's no one on board? Allen: "Dig someone else's." What to do when there are people but no supplies? Allen: "Rob a warship." Treasure, famous swords, Devil Fruits, where do the women come from? Allen: "Brothers, look! There's a transport ship that's practically floating on air, it has everything!"... Transmigrating to the world of One Piece, relying on Baki's cheat abilities to rise to power in the East Blue, starting with just his fists, he steals everything—people and ships. My name is Allen, and I advocate for freedom. (A million-word completed high-quality One Piece fanfiction is already available; readers are welcome to jump in and get crazy!)

At a top-secret base of a Tokyo police department, Rei Furuya, Japan's most outstanding undercover agent, is interrogating one of the most dangerous criminal suspects of the 21st century. "It's a shame, Inspector Furuya, I used to admire you so much. Have you forgotten how close we once were?" "My friend, let me tell you what's going to happen so you can prepare yourself. Soon someone will knock on your door and call you out. There will be someone of higher rank in the lobby. First, he'll praise you for your great service, saying the world is safer because of you, and you'll receive praise and a promotion. Then he'll say I'll be released..." "My friend, my suppliers here come from Okinawa, Tokyo, Yokosuka, and Sasebo. Before you can even manage to get my partners..."