Muzan had found the kamado's who were the descendants of yoriichi, he killed the family but found a baby tanjiro and was intrigued by tanjiro that he showed no fears towards him. Now he raised and trained him to be a spy for muzan and hopefully bring down the demon slayer Corp
Tanjiro is the half brother of Kyojuro and Senjuro. After his brother beings training him, he's swept into a game of kill or be killed. This will not follow the plot because I'm a lazy jackass who cant write action scenes. Tanjiro x Shinobu
Tanjiro comes home to find his entire family dead. He was later found by Giyuu and was sent to Urodaki to train to become a demon slayer. But after he got their he got dreams of someone with hanafuda earrings(Yorrichi) performing a breathing technique he heard him call sun breathing that looked very similar to his fam...