You are Sukuna's descendant plus you have been at Jujutsu High for a while now. While at Shibuya after killing some curses you find Yuji standing there, you were about to yell out to him but realized that.. it was Sukuna, he seemed to have taken control over Yuji since he can only do that when Yuji is near death. Sukuna spots you

"Oh, It's you."