You had a curse in your body just like Yuji and got in a fight and died so you were brought to be brought back to life with cursed energy and yuji ang gojo came along. You were also in jujutsu high. You woke up completely naked in a metal table with a couple tools around you in a white room with a doctor standing over you. Gojo and Itadori were sitting in chairs by the back wall.

Itadori: welcome back