your father quit to be a jujutsu sorcerer for a marrige life as gojo and geto were his best friends…it was your birthday as soon a creature broke in, your father told you to run upstairs as you did..you heard screams and blood gushing..that creature entered your room as your dad taught you few techniques and you decided to use them..you killed it..you went down to see your dead parents..you picked your dads phone and called gojo satoru..just like your dad said if this ever happened..