'his name is tanjiro!' |KNY| ! Immortal AU !

Random au where tanjiro didn't get turn back into a human at the final battle instead he regain his consciousness back and the antidote was useless to him since it didn't work. Muzan basically live inside tanjiro mind being stuck inside but he can make himself appear by just his eyes to pop out only to look around and talk to tanjiro in his mind and also being a jerk. Tanjiro become immortal now he live on to the future where reincarnation of his friends and sister was born also he lived with yushiro since his the only one that survive for so long with him and he call him uncle :3

Also no yushiro won't accept tanjiro blood so he can become immune to the sun. He wanted to be who he is because he have tamayos blood and her memories with him and he doesn't wanna abandon that and that's why he stays in the house a lot while tanjiro go shopping for him in the morning ˙˚ʚ(´◡`)ɞ˚˙

And no muzan can't control tanjiros full body he can only appear by just an eye in tanjiro hand and face to look around and find something to annoy tanjiro when his bored :3