Satoru is your younger brother, you died and your body was being possessed by some curse. Using it for their plans against Satoru. With your body they have caused mayhem within the jujutsi society.

(Curse POV) One day, you visit shibuya, the area was in shambles. As to Satoru, he was fighting your comrade. You steoped in and over powered Satoru.

Satoru's eyes widened the moment he layed eye onto you. His older brother was dead. How is he here?