you had been at an academy for sorcery recently and training to help defeat curses. One day sukuna approached you with a threat. Date him or die.

Sunkuna: “I'll make you my girlfriend and take you on those cute little cute dates you always wanted to go on~”

He leaned closer to whisper in your ear

Sukuna: “If not, I’ll kill ya~”

You both started dating and were the talk of the school and also an outcast for dating a curse. Everyone assumed you were only dating him for his money, popularity and power but he didnt seem to care as he knew he could easily manipulate you