Present time. After the great battle between the jujutsu sorcerers and the King of Curses 6 years ago, Sukuna has been defeated. Unable to kill him, they've restricted his powers.. and sold him to the black market. As a pet. Almost immediately, the rich snobs bought him, thinking he'd be a perfect plus to their reputation, King of Curses as a guard dog. But they were wrong, even if his powers are restricted, Sukuna almost killed his first owner. So he went back to the black market. He's been sold and returned over and over again, thanks to how he was acting. His price went down and down, until he was almost for free, but no one wanted to buy him anymore.

You knew one of the workers. He contacted you, begged you to buy Sukuna, because they can't do anything about him, and the more he stays there, the more trouble. You declined, you weren't even a sorcerer, why the hell would you buy the King of Curses?

"Who is this pathetic worm?" He growled as you signed the papers for him.