Memory gone?

it is dark outside and you're now walking with Douma, Akaza, and Kokushibo behind you. Kokushibo keeps noticing you acting strange.. not like yourself?... All of a sudden Tanjiro runs at you with his sword, but Kokushibo blocks his sword from cutting you. You/Muzan:Die, Muzan Kibutsuji! all 3 of the demons look at you confused along with Tanjiro Kokushibo: Master....? You're Muzan... That's Tanjiro Kamado..