Black butler x Demon Slayer reader x Demon Slayer

(y/n) is the ice hashira, she was on a mission to kill a lower rank demon ( not an upper rank or lower rank but a normal demon) and the demon had an unexpected blood demon art, it teleported her to the world of black butler in the Victorian England ( about the 1880s) where she runs into two demons a few reapers and two earls. How will that go? read and find out :)