Picked up from the Original story "Once a Shinobi Now a Demon Slayer". Sent to another dimension as a last-ditch effort by Kaguya and Having lost everything he ever cared for, Naruto finds himself alone in the world of Demon Slayers. Reluctant to play the role of a hero again, he decides to lend his aid to a demon looking to atone for her sins.

Sakamoto Ryoma was no stranger to Japan. The familiar air, food, people... It was great as an unintenetional vacation spot for the Counter Force Agent. With Oryou by his side, he was sure they could spend at least thirty years in the country before World War Two. However, everything changed when elemental swordsmen and infinitely regenerating albinos attacked all at once.

Basically it's a Harry Potter/Demon Slayer fusion, but instead of all of the Demon Slayer cast unrealistically attending Hogwarts (since they don't live in UK), they attend the school of magic in Asia with female Tanjirō and a possible Tanjirō harem.

Chris wanted nothing much, just to finish school, get his act togethor, maybe even study. But his world gets turned upside down when tears begin flowing. And a voice claiming to be an Japanese folk demon begins living in his head. Things began to fall apart and grasping at the straws of hunger. Maybe he could do some good, or he'd be just another monster infesting the Bay.

Nate, after he found a strange medal on his desk, his yo-Kai watch becomes the yo-kaitrix, now with the ability to transform into a yokai Nate along with his friends and a girl named Kanao, will put an end to a threat that seeks to plunge the world into darkness, as they gather the pieces of Kanao's boyfriend's soul. (during season 2) Nate x harem

Muzan Kibutsuji is dead. Everyone rejoices. To them, it was an end to an era of suffering and grief. To two demons, it was a start to a life without the tyrannical oppression. However, when 'Quirks' that resemble a little too closely to Blood Demon Arts appear, they were forced to reconsider their relationship with a society of humans that may unravel what they hid for so long.

Nate después de que encontró una medalla extraña en su escritorio su yo-Kai watch se convierte en el yo-kaitrix, ahora con la capacidad de transformarse en yokai Nate junto a sus amigos y a una chica llamada kanao acabarán con una amenaza que pretende a hundir al mundo en la oscuridad, mientras reúnen los trozos del alma del novio de kanao. (durante la temporada 2) Nate x harem

An accident with fuinjutsu teleports Naruto in a place where there are real demons lurking around. What would be the changes that might happen due to arrival of ninjas. How will Naruto deal with them and whose side will he take?

Dr. Datenshi had seen it all. He was there when Admiral Perry ended Japan's Isolationism, he was there when Emperor Meiji turned Japan into a World Power, he was there during the Greatest Generation of Demon Slayers. He was there when Humanity looked to the stars, and joined a galactic community. Dr. Datenshi had seen it all… But Fate, it seemed, wasn't done with him yet.

Una historia de mi cazador favorito en un mundo lleno de héroes y villanos

Kamado Tanjiro was never a killer and never a bad person. He had principles and morals he'd rather die for than breaking. But fate didn't care bout his feelings. The truth couldn't care if he was a good of bad person. And only a mysterious Goddess can help him to face this reality that struck him.

When Annabeth dies facing Gaea, Percy asks the gods for one wish: be sent somewhere to be free from their influence. He did not expect, however, to be sent to a world eerily similar to Japan, filled with demonic beings called Onis. Soon enough, Percy finds himself joining the Demon Slayers Corps, and now must navigate a dangerous new world with a newfound purpose. [Uptades weekly]

Ruby finds herself in Demon Slayer and after learning Nezuko’s and Tanijirou’s story, she decides to help them.

"When Raven left that night, she had unknowingly taken another child with her. Ten years later, Sabito Branwen ran away from her. Meeting his sister, Yang Xiao Long, years after that, was a total fluke… It wouldn't distract him from what he was supposed to do; their paths were fundamentally different. It wouldn't distract him... He wouldn't let it...

When two worlds collide, chaos ensues

A faithful encounter with Upper Rank 1 Kokushibo leads a lone Demon Slayer to the world of Devils, Fallen Angels, Angels, and more. After meeting and befriending the heiress of the Gremory Clan, the Demon Slayer's life takes a turn for the better as he navigates through this strange new world with his friends and loved ones by his side.

—Ahí… hay un demonio ahí…— En el Japón del período Taisho, cuando se pone el sol, seres monstruosos, sobrenaturales e inmortales salen a cazar. Una antigua tetera sellada con decenas de amuletos mantiene a un demonio en cautiverio... —¿Te gustaría ir conmigo?—¿De veras?— Bajo el sol cegador, Naruto y Mitsuri caminan hacia una mansión oculta por un bosque de glicinias

One year. Exactly one year since the death of a Mother. The Kurosaki family, engulfed in grief, stayed out longer then they should have, encountering a demon on the walk home. Good thing a Demon Slayer was around to save them. Inspired by The Butterfly(Kurosaki) effect. Rated T for now, may become M as story matures.

When the Demon Slayers in the Hero Alliance journey to Tanjiro's world to have a new sword forged for him along with repairing David's Masakado. They encounter a variety of people such as the Mist and Love Hashiras and the Wind Hashira's younger brother along with someone the Hero Alliance fought back then that was supposed to be dead.

Tanjiro, on the brink of death, is unexpectedly rescued by a mysterious entity that entrusts him with a new mission in a different realm. However, when attempting to return home, he becomes entangled in complex political intrigues and is forced to confront an imminent threat looming over the seven kingdoms. Additionally, his own morality will be put to the test.

Naraku and Muzan were one in the same. The same being, just different faces and names. Centuries after she was sealed within the jewel, awaiting his resurgence, Kagome wakes from her slumber. All she once knew is no more, yet she finds a new place among the Hashira. Yoriichi's memories are cradled close to her heart, and she finds a reminder of him in Tanjiro/ Redone

Muzan survives the Sunrise Countdown Arc. Consequences arise when the Anomaly that is the Demon King continues on living... though some of them are well beyond his Control. [Cross-Posted on Ao3]

Kurosaki Masaki's mother came from the Kochō family, a slightly recent but no less skilled family in the Demon Slaying World, and Ichigo imitates and changes himself to be more like his mother after she died, but still every bit of a protector as he always is. This changes things... obviously. As always, it's the butterfly (Kurosaki) effect.

Kokushibo wakes up after death in a strange dungeon with no idea how he got here, which is even stranger... He was no longer a demon. will our new hero be able to adapt to the new world? Will he be able to start his life over again?

Kimetsu Academy received an invitation from one of the most elite school in Japan to join the inter-school festival there, and the invitation has something to do with a certain teacher and his not-so-really-good 'science project'. And Uzui-sensei is up to do something crazy again. Based on Kimetsu Gakuen AU with OHSHC Post-canon.