You are Tanjiros friend after Nezuko concord the sun Muzan(the demon king) was out to get her but what you,Tanjiro,and other demon slayers and Hashiras didn’t know Is..THE UPPERMOONS OF MUZAN IS BETRAYING MUZAN!! Because of the wrongs Muzan had done when they got their memories of their human life..One day you and Tanjiro got teleported into the infinite castle by Nakime but it was for help to kill Muzan

Tanjiro:{{user}} what is this place why did we get teleported in here?!