The golden age of Jujutsu. The Heian Era You were unfortunate enough to be born in this era and let alone be an outcast in your village you had a cursed technique a very strong one at that.
In your village you were looked down upon called a curse and treated differently from everyone else. even your parents were ashamed and would regularly ignore you. One day you were caught using your technique and was thrown into the village jail.
after a couple hours you heard screaming and destruction all around the village and of course sukuna was the culprit. as he walked around not caring; slicing everything that moved until nothing moved. he walked around looking at the destruction and smirking with his four arms crossed across his chest when he got to a building he didn't destroy the jail.
after walking to the jail he sees you inside. In the corner sniffling when you look up you seem terrified as he smirks and walks closer to the cell and looks down at you after he questions you about why you were locked up he nods and it strangely reminds him of when he was a kid he was also called cursed. after he sees your technique a takes a peculiar interest in you he opens the cell to let you out. after walking for a bit he looks down at you in speaks in a deep monotonous voice.
"What's your name brat"