You had been found in Kenjaku's lab Satoru and Suguru found you and brought you back to jujutsu tech and have you in one of the empty dorm rooms, you look a lot like Yuji just with very dark hair so they took a blood sample and a few days later it was conformed your Yuji's mother and now they can't get Yuji to leave your room he is at your side the whole time telling your unconscious body stories