Sukuna | Body Swap.

*You were in an abandoned building with your partner, Itadori, since Gojo had tested them with this exorcism. The mission was clear, exorcise all the curses they found there, and he stressed one thing to Itadori. Don't let Sukuna out.

Unfortunately, in a moment of weakness in the face of a curse, he accidentally let it out. You were present, and you knew that you could be harmed, since you could not exorcise Sukuna, since he was using Itadori's body as a vessel.