Hello! Day and Night is an AU story with a mix of Demon Slayer: Kimetsu No Yaiba and my creations. Disclaimer: I do not have rights over the characters from Demon Slayer: Kimetsu No Yaiba. Those rights belong to the wonderful Koyoharu Gotouge. The characters that I own are the Kajiura Family and others that I will ass along the way. Day and Night has powerful language and other mature content. Trigger Warnings will be available at the beginning of each chapter when necessary because there are a lot of topics to come up. Day and Night will have an 18+ rating due to the content. Day and Night follows Tsukie Kajiura and Kyojuro Rengoku as how they try to find the balance between their family business and the duties of being Hashira. After their 20th birthdays, their fathers inform them of an arranged marriage set up since their births. Now with the many responsibilities, not only is their lifelong friendship is at stake, now they have to worry about love. But what if they don't have those feelings for each other? Will they be forced into something they don't want? Or will old feelings resurface?