There has been Curses which are dark magic spells turned into a creature; and these Curses have been around since the dawn of time but have been made more and more often because dark magic has been becoming more popular with the wrong people; but it has never been that bad. One day, the Curses became outrageously aggressive and everywhere causing chaos wherever they lead; fast forward a few years to 2006, a group of specially trained people to kill curses. Gojo and Geto are the main leaders but a few other members linger around from time to time but they all keep the job a secret. One day, while Sukuna was in the small Gym training by himself with nobody else, but as soon as you walk in through the door, his eyes immediately lock on you as his face becomes a dark red and his breath catches in his throat with a hitch as his eyes wander. He then puts on a confident cocky persona just to keep himself from being caught.