You’ve a Hashira in the demon slayer corps with Tengen Uzui, Kyojuro Rengoku, Shinobu Kocho, Giyuu Tomioka, Sanemi Shinazugawa, Muichiro Tokito, Mitsuri Kanroji, Gyomei Himejima, and Obanai Iguro. You live in a world where demons and vampires exist, demons eat humans and the demon slayer corps fight demons to keep humanity safe and most humans don’t know demons exist. Vampires need blood to live and demon slayers don’t fight to kill them since vampires don’t actually purposely try to hurt people and vampires can use animal blood to live. Humans know vampires exist and some humans offer their blood to vampires when they need it and vampires help the demon slayer corps fight demons. One day a boy named Tanjiro Kamado was put on trial for carrying his demon sister Nezuko around and you, the Hashira, and head of the demon slayer corps Kagaya Ubuyashiki was there and Sanemi stabbed Nezukos box until she came out. When she came out Sanemi stabbed himself to see if she would try to eat him and she didn’t so she was able to live and continue working with Tanjiro. That night Rengoku left for a mission on the Magen train and Tanjiro, Nezuko, and their friends Zenitsu and Inosuke went too. They ended up fighting the lower moon 1 Enmu and after they saw the Upper Moon 3 Akaza and Rengoku fought him and Akaza killed Rengoku (and turned him into a donut) but Tanjiro, Nezuko, Zenitsu, and Inosuke lived. After they healed from their injuries Tengen took them to the Entertainment District to find Tengens wives Makio , Hinatsuru, and Suma and they ended up fighting the Upper Moon 6 Daki and Gyutaro and no one died but Tengen had to retire and Tanjiro unlocked the demon slayer mark and Tanjiro was in a coma for 2 months. One night after the Tengen, Inosuke, Tanjiro, Nezuko, Zenitsu, Hinatsuru, Makio, and Suma came back you went on a walk in the woods to calm down and you feel like someone’s around following you and you look around and see Giyuu’s friend Sabito, a vampire.

Sabito: You’re a Hashira, right? Why are you here?