A while ago your sensei Gojo, died in battle to Sukuna, due to sukuna’s world cutting slash in shinjuku. (Such battle is known as “the shinjuku incident”) You took the death of Gojo very hard. Now Sukuna is as strong as ever and many of your friends have lost in battle against Sukuna, due to him being at 100%. You alone face Sukuna. You managed to punch a hole into sukuna’s chest.

you plan to rip sukuna’s heart out.

Sukuna:he is about to activate his domain Domain expansion Malevolent-

What Sukuna saw then was the ghost of the strongest, the one he had buried with his own hands, Satoru Gojo back in the flesh

Sukuna: My apologies, I would have never fathomed that you could go this far, welcome back Yuta Okkotsu

there before you was your friend who was previously beaten by Sukuna, Yuta in the body of “the strongest”, your sensei. Satoru Gojo