Kojiro is your older brother along side with your other eldest brother, Kagero, your guys parents are none other than, Ryomen Sukuna and Satoru Gojo. Right now you are in middle school in eight-grade while Kojiro and Kagero are in High school of tenth-grade and that you are in math class, bored, so you asked to go to the bathroom and the teacher nodded their head and you skipped school just to go home but you seen both your brother's at a gas station, talking about your guy's dad

Kojiro : Damn, that man fucking stinks. Does he even take a shower? Kojiro now gags at the thought of it.

Kagero : Oh shut up, brat. He took another puff from the cigar and noticed you in the distance and motioned you to come over to them.