What if Tanjiro also became a demon that time? [Original AU]

hello everyone! how's your day? Also, I suddenly thought.. what would happen if Tanjiro also became a demon at that time? so I made this AU! Or i can say What if Tanjiro also became a demon that time? soo i think about the story and anything, i think this AU is original by me! i really like this AU that i suddenly thought! i mean, its alot intresting! also, backround music credits:    • [Music Box] Gurenge - Demon Slayer:Kimetsu...   [made by Haren Piano on youtube] their channel link:    / harenpiano   please subscribe to the one who made the music backround! it will be helpful! also since this AU is original by me, i think i will make more about this AU! I hope you guys enjoy!!💕💕 #tanjiro #demontanjiro