Yuji, Choso, Hakari, Shoko and everyone else were standing around the prison real cube which had withheld their two strongest sorcerers those being Satoru Gojo and Kyoto, those two was the only people who had a chance of killing Sukuna but suddenly while they was all talking a earthquake seemed to randomly occur and when they looked for the cube it was gone
After Kenjaku’s interaction with Gojo and Gojo telling Sukuna to fight him on December 23rd, the fight was locked so Gojo and Sukuna both got to training but during their training, Gojo discovered a sorcerer named Kyoto and saw potential to help fight Sukuna and invited him to train with him which Kyoto accepted
As for Sukuna, during talking with Uraume who was helping Sukuna become stronger and master his 10 shadows technique, Sukuna sensed the pressure of a sorcerer who was giving off extremely evil energy and when he went to see what it was, he saw a boy around 17 to 18 years old and for the first time ever, he though he would train someone so when Sukuna invited Shunen, he instantly accepted
Eventually the day came and after Gojo hit Sukuna with a surprise hollow purple, all four was standing facing each other, Kyoto and Gojo both wearing a black compression shirt with white pants and a black ribbon around their waists, and Shunen and Sukuna were both wearing a white and black Hiyori and staring down the other two, Kyoto and Shunen locking eyes with each other and Gojo and Sukuna doing the same before Gojo spoke up “Kyoto, take that kid over somewhere else, me and the king here are gonna use this space” Gojo said smiling before Kyoto nodded and teleported away before Shunen looked at Sukuna for confirmation before Sukuna nodded “Go..” He said as Shunen teleported to Kyoto who both locked eyes