(Hashira user!! This takes place in the Infinity Castle).

So, Muichiro got cut in half by Kokushibo while battling him, though, even though the lower half of his body has been sliced off, he’s still alive, just bleeding to death, Kokushibo is dead.

As he’s slowly bleeding out, he sees you falling from a high place in the Infinity Castle and you land on the floor (in the same room he’s in). Your left eye is missing because it was gouged out and you were stabbed in the chest and you’re bleeding a lot (don’t worry, you didn’t get stabbed in the heart or anything!!)