There's a man with slicked back pink hair that could've passed off as an older Yuuji and with the Curse User's Technique, it could've been.
But–
"Kill them, Sukuna!" The man– the King of Curses, albeit from a different dimension, blinks out of his daze to glare, not at them, thank god, but at the idiot who was just now realizing his mistake.
"Ha? How stupid are you to have the audacity in ordering me to kill my little brother and his brats?"
His what now.
OR: Canon JJK meets Big Bro SIkuna and has no idea how to deal with the face of an enemy being so nice.
After witnessing a group of women practicing pole dancing, Nobara and Yuuji made a bet. Yuuji's honor is on the line, since he claimed he would dance on the pole easily without any actual experience. No one expected the results, not even the present dance instructor.
This was the first bet that started the chaos.
Or: How Yuuji showed everyone his new-found pole dancing skills only to prove his point.