Crossover - anime/mangas ONE PIECE & DEMON SLAYER: KIMETSU NO YAIBA. Roronoa Zoro and Trafalgar D. Water Law make it ashore on an unknown island, after a ferocious sea battle against the Marines, getting into an onslaught inside unknown waters. They have to find a way back to Bartolomew's ship and the crew, until they're involved en-route in an expedition against residing demons.

The appearance of one person can offset an entire timeline. Changes, turns, twists. When that person doesn't exist in history, there's nothing that fate can do to try and 'right' what they have 'wronged' except to just let it happen. This is how timelines change and altered universes are created... Better known as: Musashi messes another timeline up, but in a fantastic way.

BoBoiBoy finds himself thrust into a world filled with man-eating demons and demon slaying swordsmen. With no indication of how he got here and his power stripped from him, will he able to live long enough to go back home to his own? [Kimetsu No Yaiba x BoBoiBoy Galaxy] DISCLAIMER: Demon Slayer is owned by Ufotable. BoBoiBoy/Galaxy is owned by Animonsta Studios.

Essa história irá se passar em volta de vários personagens, em um universo diferente... Em um universo escolar! Kimetsu no Yaiba... É assim que é conhecida a escola dos nos nossos protagonistas, motivo? Pode se dizer que ela é uma das escolas mais temidas de todas! E é a rival da escola do temível diretor Muzan Kibutsuji, que tem a terrível fama de "Rei das luas demoníacas".

a cursed treasure causes Oriko , Sayaka , and Chris Magica(my Oc) to almost causes the worlds destruction but they stop it but wind up in the wrong ever and now have to deal with witch's and demons

Inosuke is transferred to the world of Remnant and shenanigans occur. Blake PoV. Inosuke x Blake. Oneshot.

After being killed by Tomura Shigaraki, Overhaul found himself in the universe where his plan of reinstating Yakuza can be fulfilled without using extreme acts like before. However, he also must search new allies and contend with the Demon Slayers and Oni. Rated T because of Overhaul's Quirk. a BnH x KnY x Rurouni Kenshin triple crossover. Enjoy! Beware SPOILERS!

This crossover takes place after the Goku Black arc Dragon Ball Super and at the start of Kimetsu no Yaiba. Also it's an alternative Dragon Ball Super timeline part involving non-canon characters. Plus Dragon Ball Heroes is also involved.

This is a tale of demons, and those who slay them. A tale of immortals, and the cost of their lives. A tale of a legacy, a name, and a Fang to be bared against the howling dark. This is the tale of the man once known as Sekiro, the One Armed Wolf, and of the boy who would become his disciple.

After the long battle with the defeated Upper Moon 3 Akaza, Tanjirou Kamado, in a battered state and unable to move any further, had died, and met with the first Breath User Yoriichi. With his goal of turning Nezuko into a human now completed, the young Demon Slayer must now seek a new purpose. To help others in need in a new world filled with Heroes and special powers.

Ochako Uraraka didn't know how she ended up in this situation. One moment she was walking down the hall to show off her kimono, and the next moment she was falling. Now in a place full of wisteria trees and demons, Ochako has to stay out a week in selection she had no business being in, and find her way home. But first, she has to survive.

A spin off my Mama Yang Academia and Demon Slayer.

She died. This was the only memory she had, nothing about what caused her death. Currently residing in 14th District in Rukongai, she never expected she would get noticed by a small pink-haired Shinigami of all people. (First few chapters are revised).

Thanks to the Dimension Tide, Godzilla Junior has wound up in a strange new world in a strange new body! Will he be able to find a way back home? Or will he be stuck here forever? Find out as he deals with the new threats posed by this world!

Ruby Rose Daughter of Summer Rose is devastated when her family is killed by a demon one night and now seeking retribution vows that she will help protect others from the demons. Basically Rwby characters in the demon slayer environment.

It was just his luck that he fell for a girl who babbled about time travel and strange vehicles. Tanjirou, Kagome. Canon-compliant.

All it took was one wish and it was over. It just simply meant she would die while they all could live, but Tsuru was fine with that.However, reincarnation went a little haywire and she remembers it all. Everything. That wont stop her from living her new life though. Nothing will stop her from creating a new family. Not even a devil of a man named Orochimaru. (OC)

Ashina was but one empire of the Sengoku era that fell before its own greatness, and by the time of the Taishō-era, stories of it were comparable to folklores and nursery tales. Its secrets remain there to this day, and they will no doubt be uncovered by those who wish to be privy to it. However, some secrets were meant to remain buried, and for good reasons…

Tanjirou encounters the Devil. She only wanted to have tea with him. - After Kibutsuji Muzan's defeat, Homura visits Tanjirou's world.

{Naruto / Nezuko} As Shinobi meets Slayers, their worlds begin to spiral into a mess of untold horrors. But, between all that, Naruto begins to find a little solace that their might just be a girl who's quite a bit more demonic that he is. [ft. Tanjiro/Kanao; Sasuke/Sakura; Giyu/Shinobu] ((04: The Nameless City))

Jaden finds Nezuko after she is attacked by a demon and takes her to the nurses office.He finds out about demons and wants to protect her and she sees everyone as family but stills remembers her love for jaden.

Zeno soothes her, telling her it's okay. But her cries only intensify, as she hears the tragically gentle and kind sounds in the voice of an old soul. -Zeno from Akatsuki no Yona in Kimetsu no Yaiba. Drabble-ish, atleast 1 update per week(?) and a long time before actual plot comes to play. Editing and changes in story as the manga updates and new information is revealed.

(MAJOR SPOILERS FOR PART 7) Alternate Universe Diego died tragically. Victory was right in his grasps and he wields one of the most powerful stands. However, fate had other choices for him, and he is transported into yet another universe. Let's just hope he can survive this one... (rated T because of some harsh language and violence. No romance but there will be hints of blushing)

As a child of brightness, Elaine Kamado seemed to bear good fortune. However, when an ancient evil threatens the world, Elaine must fulfill her duty as member of the Demon Slayer Corp and slay it. It seems easy, or so she thinks, especially when a demon sends her back 132 years in time and meets her ancestor: Ciel Phantomhive! Can Ciel help his descendent get back to her time?

Tanjiro and the Demon Slayer Corps have finally defeated Muzan Kibutsuji, but as he lays dying, he flips them the final bird and sends Tanjiro and Nezuko to another universe. A universe with ghouls instead of demons, where trying to help ends with the sibling pair up to their armpits in danger.