Butterfly of the Ocean (KNY x Harry Potter)

Y/N L/N is an ordinary KNY fan and diehard Potterhead, as is her best friend since seven years old, Xu Zuihui (徐蕞徽). One day while doing her maths homework, Y/N's pen ink exploded and she and Zuihui find themselves in the Demon Slayer world-except in the Reiwa Era.

Just as they are adjusting to life in the headquarters and training to be a Demon Slayer while finding a way to get back home, the nine Hashira, Tanjiro, Nezuko, Zenitsu, Inosuke, Y/N and Zuihui suddenly find themselves in the Wizarding World, or on the Hogwarts Express, to be exact.

Apparently, the Hogwarts students have all read the KNY manga. Some muggleborns had brought anime and manga to Hogwarts and there were quite a few weebs in there. It was the year 2021, yet Harry Potter, Ron Weasley and Hermione Granger, a.k.a. the Golden Trio, were studying their sixth year of Hogwarts. In addition to Voldemort and his Death Eaters, there were demons to be found lurking near Diagon Alley and even Hogwarts.

As diehard Potterheads and devoted KNY fans, Y/N and Zuihui were delighted to find themselves in this "mess". Along with the spirits of Sabito, Makomo, Tsutako and Kanae, the pillars except Giyuu and Shinobu, the "Golden Trio" and the main four of Demon Slayer, they start shipping GiyuShino 😏. But in the end, all they want to do is go back home. How did this all happen anyway?

Includes a textfic.

KNY belongs to Koyoharu Gotouge and Harry Potter belongs to J.K. Rowling. I do not own any of the characters in this fan fiction except Xu Zuihui.