Giyuu Tomioka is a 21 year old man with a cold gaze that could shiver employees with intimidation. Judgmental opinions and rumors spread of his cold heart. He is willing to help those around him who help themselves but anyone who defies his aspiration towards his motive of empowerment, would be erased from the business environment. He is still human even though he is a man of great disliking. However at home, his facade drops and he gets to feel loved and cherished by four children he adopted from the Urokodaki Children's Home out of a kind heart. Tanjiro, Nezuko, Inosuke and Zenitsu will do everything in their power to make Giyuu feel happy and loved even if it means he has to be shipped with a random lady from a totally different company who they don't know about. Shinobu Kocho is a 20 year old, independent and feisty woman. She takes what she believes in very seriously. Even though her smile and kindness could shine a light on anyone's darkness this doesn't change the fact that she does it to conceal her own. A hard worker of great income yet she still feels empty. What will she do when she is asked to work with a close associate who she low-key rivaled since childhood? Will she just uncover his true weaknesses? Will befriending him cause her to reveal emotions she never knew she could be overwhelmed by? Oyakata-sama, the head of the EHFU (Engineering Hashira Foundation Unit),suggests that they cooperate and work together on a massive project for 3 hospitals within the period of six months. Join as Tanjiro, Nezuko, Inosuke and Zenitsu take advantage of this and strive to pair these two together so they can become happy.

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.