While on a rescue mission, Sanemi and Obanai come across the Infinity Castle. But that's not the only strange thing they encounter. The demon they come across is also an enemy of Muzan. But can they trust her? And could she trust the Hashira? Especially now, when all they knew about the demon world would start to crumble into something far darker.

Just some background information (part 1) of a budding romance fanfic.

Tanjiro went home from Saburo's early that morning, before the sun rose. He didn't mean to disobey the older man, but the scent going up the mountain towards his house was giving him a horrible feeling. Not only that, but the smell of blood. When Tanjiro arrived home, it was to find a man attacking his family. When they all came back to life, his entire world changed.

Muichiro Tokitio lost his sister Aria when they were young but maybe just maybe he can find her.

Demon king Tanjirou from cannon (spoilers Find himself stuck in a universe and time where everything is different also posted on Quotev forgot how to tagg here

In the shadows of Taisho-era Japan, where demons stalk the night, Haru, a young man from a ravaged mining town, is transformed into a half-demon by a devastating disaster. Rescued by the compassionate Love Hashira, Mitsuri Kanroji, Haru walks a precarious line between his human heart and his burgeoning demonic nature.

Sanemi gets sick and tries to hide it from the other Hashira. Eventually the others find out and he is taken to the Butterfly Mansion when a certain someone secretly visits him. Told in Sanemi's perspective. Rated T for swearing. Plz read & enjoy!

Muichiro has a nightmare that Genya hates him for not protecting him from a demon, and Genya tries to calm Muichiro down, but Mui seems scared of him. Plz read and enjoy! Genya x Muichiro GenMui

Obanai Iguro is an elite warrior, a Hashira, of the Demon Slayer Corps. Unbeknownst to him and his peers, the centuries long war between the Corps and the Demons that plague humanity from the shadows is in its final years. Obanai will have to face hardship in battle and in his relationships to have any hope of survival.

Muichiro wakes up sick unable to move, Genya gets help. At the Butterfly Mansion Shinobu finds out he had been poisoned from a demon he had fought the previous night. Plz read & enjoy! (GenMui Genya x Muichiro Genmui)

What if Yoriichi Tsugikuni and Michikatsu Tsugikuni (Kokushibo) swapped places with Tanjiro Kamado and Nezuko Kamado. This is my first story so it might not be too good. But I will make sure to improve.

Have you ever wondered what would have happened if Tanjiro left Saburo's house earlier and came face to face with Muzan earlier? Well here it is, the journey of one demon Tanjiro Kamado. (Multi pairing)

For a thousand years Kibutsuji Muzan has been looking for his younger brother, the Omega, and many centuries later, Taisho will find him again, but during the fight between the slayers and his second objective: His queen!

Genmui hotsprings fluff. Plz read and enjoy! (Genya x Muichiro GenMui) Oneshot

Genya and Muichiro are sent on a mission against Upper rank 6. Genya stares in disbelif as he sees Muichiro get shot by his own weapon. Don't worry they both are okay. Genmui

Tengan Uzui led Tanjiro, Zenith and Inosuke to a mission in Yoshiwara to do a secret investigation about a demon hiding there after not getting any word from his three wives. Mitsuri happened to pass by and is also here to investigate, but the demon Daki is waiting for them. After seeing Tanjiro and Mitsuri GETTING COZY, Daki decided to TOY with them SENSUALLY. Tanjiro x Mitsuri.

After defeating two members of the Twelve Kizuki, Tanjiro and Mitsuri are recuperating at the Butterfly Mansion, where Shinobu paid a surprise visit, and agreed that the two Demon Slayers spend an extra day to recover. And after discovering that Aoi had a hidden sake, Aoi proposed that they play a Truth Or Dare game, which the others learned that the game has ECCHI elements.

Muichiro is sick and Genya takes care of him and makes his favorite food as a suprize. Genya x Muichiro GenMui. plz read & enjoy

[Kyotan.] Quando Tanjiro viu a vida de Rengoku se esvair aos poucos, ele desejou poder fazer algo para mudar aquilo, não importava o quê. Mas quando Zenitsu lhe deu aquela idéia, aquela maldita idéia, ele firmemente duvidou e não pensou que realmente funcionaria quando seus dentes se cravaram no pescoço do Hashira das chamas com força. Ele não se arrependeu, mesmo que doesse.

Muichiro is tired and falls asleep sitting against the couch. Genya makes them a makeshift bed and they have a living room sleepover. Sorry it's so short. Muichiro x Genya GenMui

A new Demon King emerges. Once again another script style idea through the use of an OC/Tanjiro mix POV. How would the events of Demon Slayer change if Muzan wasn't the only one to be able to control demons? Now a full fanfic as The New Demon King.

Like my first one, this is to be a crossover with something I made, but doesn't have a category. Others can have a go at this, and this is to be a horror.

The Demon Slayer gang arrive in our world surrounded by the Miko, a family of priestesses. Tanjiro discovers that he has brought the breathing techniques to this world too, only it developed in a strange way. With their world in danger, and a goddess (that resembles Muzan) the cause of it all, can Tanjiro and his new friends restore things?

Muichiro and Tanjiro go on a mission in a blizzard to fight a lower rank. Muichiro almost drowns, Tanjiro almost dies, and the Kakushi eventually find them unconscious. Plz read and enjoy!

A little idea from my brain in which an OC (based both on my mind and the character Tanjiro) is from the past way before the battle between man and demons ever occurred, told from the time of Tanjiro and Nezuko's trial after the fight with Rui.