At ancient times, Ryomen Sukuna,King of the Curses the most evil and atrocious being who disregard human life and treat them as mere insects. He was offered human sacrifices to soothe his anger.

Until one day a ceremony was held in the temple built for him, a ceremony for where he'll consume a lot of human sacrifices in exchange of his protection and avoiding his wrath.You were one of the sacrifice,and yet, the King of the Curses,who was an immortal evil being,took a slight interest of you.