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.

He travels to the Marvel universe and obtains a cheat ability called "The Strongest Demon Hunter," but little did he know that this cheat ability would be extremely unreliable.

"System, do you even know what a Demon Hunter is? Look at this utter mess you've given me!!"

With the bonds of family and friends, Carl began his colorful life in the Marvel universe...

[This is based on the movie's plot; there may be some changes to the timeline and storyline. Please excuse any inconvenience.]

Out-of-character (OOC) setting reworked. If you dislike this, please do not read. This is my personal take on the Shadow, a powerful being. Read this fanfiction without thinking. Also, the Shadow is not the male lead; he is a higher-dimensional god.

"We are those who lurk in the shadows of the Shadow Court, hunting down the shadows."

"Twilight has fallen; the time for reckoning is approaching."

"I am the shadow, and the one who lurks in the shadows to hunt the shadows is the master of the Shadow Garden."

Sakuya transmigrated into the Naruto world and became a member of the Uchiha clan, a family wiped out by their own people! Luckily, he awakened a god-level daily login system, earning rewards simply by logging in every day! Day 1: Navy Six Powers! Day 2: Whitebeard character card! Day 3: Zanpakuto: Kyoka Suigetsu... And so, without realizing it, Sakuya became invincible! When the Third Hokage and Danzo planned to attack the Uchiha clan, Sakuya smiled and shattered the Hokage Rock with a single punch! Sakuya: "From today onwards, I stand in the heavens!" Minato Namikaze: "Sakuya's Flying Thunder God Technique is even better than mine, what am I called the Yellow Flash for?" Madara Uchiha: "In this ninja world, only Sakuya is worthy to dance with me!" Onoki: "His Susanoo is bigger than a mountain, no joke!" Kushina: "Sakuya! I want Gear Second Vibration Mode!"

A young monk raised in Shaolin Temple wakes up to find himself transported to the Douluo Continent, specifically to the Vajra Clan, a relatively unknown family in the original novel of the Star Luo Empire.

They don't join tour groups; they take an independent approach.

Transmigrating to the Douluo Continent: The Peerless Tang Sect era, becoming the system's origin, creating system clones to plunder the continent's fortune, and achieving the supreme ruler of the universe! Luo Hongxue: I just came to Shrek Academy to laze around, how did I end up becoming the Pavilion Master? Long Tianyang: Laughing at the world, Hall Master Jing, you don't want your sister (granddaughter)... Xing Luoluo: Crowned Queen, becoming the peerless Empress of Douluo Continent! ...

"If I don't die today—" Paul's voice suddenly rose, each word seeming to be squeezed out from the center of an electromagnetic storm, carrying a metallic friction texture and overwhelming killing intent:

“From this day forward, I will broadcast the wails of the defeated through your communication networks! I will pave every naval base port with the wreckage of your proud warships! I will keep the gates of justice permanently short-circuited, and I will cause Marineford's power to go out inexplicably every night! I will become the longest and most lucid nightmare in your naval careers—”

The railblade was raised high above his head, aimed at Garp, Aokiji, and seemingly at the entire World Government.

"—Until all of you live in endless regret, regretting why you didn't kill me completely on the ice plains today!"

In the Elemental Plane, the battlefield was reduced to scorched earth. The roar of the Balrog lord clashed with legendary sorcery, shattering mountains and boiling rivers. The wizards' defenses were on the verge of collapse under the crushing force of pure violence. "Where is the reinforcement?... Our mana is exhausted!" a wizard roared, his voice drowned out by the deafening explosions. Boom—Boom—Boom—!!! A series of sonic booms tore through the sky, and a hundred-meter-tall steel shadow, like a meteor, crashed straight into the battlefield! A terrifying shockwave mixed with lava surged into the sky, sweeping away the smoke and the aftershocks of magic. The wizard gaped, staring at the terrifying steel behemoth before him, speechless with shock. But then, a red light flashed on the behemoth's head, emitting a deafening synthesized voice: [Scouts in position] [Coordinates confirmed] [Requesting command: Legion deployment] Plane...

Chu Fan transmigrates into the Resident Evil game world and is trapped inside the Zodiac Train, facing imminent danger.

Fortunately, the monster-slaying and leveling-up system was activated at a critical moment. As long as you fight monsters, you can level up and become stronger, and various equipment and resources will drop randomly.

So he turned what should have been a horror game into a game of mowing grass.

Rebecca: "Wow, that's amazing! That was so cool! He took care of those terrifying zombie monsters like they were nothing!"

William: "Where the hell did this monster come from? It's even scarier than the monsters I created."

Jill: "What a strong man! I like him."

Wesker: "I can't win, I'm outta here."

...

[No System][Multiple Female Leads][Abuse of Three and One][Ability Development] "I Play with Mud in Douluo Continent" and "Douluo Creator: My Martial Soul is Clay" tell the story of Lu Yan, who transmigrates to the Douluo Continent and is born in Tao Tao Village, a place where potters make a living. He awakens his clay martial soul, possessing innate soul power of level one. Su Yuntao: "A useless martial soul." Lu Yan laughs. Why can't he play with mud? Let's think outside the box: for example, [shaping], [earth-遁], [earth puppet], [piloting a Gundam], [carrying a bag of rice up several floors], [celestial phenomena], [five elements derivation]... As long as you play with mud well, what is impossible? There are no useless martial souls, only useless masters!