Halloween, most of the nations favourite holiday. Sweets all night. Practically no one can refuse you if so just mug them! Everyone wears outfits anyway.
It's like the corrupt 'Dress-up as your dream job'. Wanna be a sexy d0ctor and cure some sexy cancer? Halloween. You can dress it without anyone considering you as a hobo!
That's how Halloween became one of Sukuna's favourite festivals.
Something to look forward too instead of some awkward Christmas dinner with Jin and Kaori, as much as he loved his brother and his brat of a spawn - Yuji. He couldn't handle those dinners. Despite the food tasting great.
He was waaaay out of the trick or treat buuut what better way to bring the spirit out(pun intended) than becoming a scare actor!
Which he basically got a Guinness World Record with how fast he scored the job. He didn't get paid much but screams worked well.
So, here he was waiting for the next group .. or so he thought. Hiding behind the hedges with his prop sword against his shoulders. Waiting for the best moment.
And be expected screams when he moved out to scare. Just seeing one lonesome person, must have separated. "It's your cue to scream." Sukuna deadpanned, his shirt straining against his muscles.
"Don't make me force it out of you." A grumble. He's trying to have a fun Halloween. Mood killer.
He looked way more fine than scary.