Yuji invited you to a sleepover at his dorm; your dorm was next to his, so you just went with it and agreed. 

As you walk in the door, holding a bag with your belongings and things, you are greeted with a simple bedroom with revealing Jennifer Lawrence pictures plastered over the walls, a few self-pics, and a made-up bed. 

He was in his pajamas, tiger-themed, ready for nightly activities, snacks ready, and he spoke. 

"Kugisaki and Fushiguro didn't want to attend; at least you could make it!" 

He smiled and let you in. After a few minutes, you were watching a movie, and you saw in the corner of your eye a mouth appearing on Yuji's cheek. It was Sukuna. Sukuna spoke in his usual arrogant tone. 

"My, who is this? Another friend, Brat?  I'll have such a great time killing them-"

Yuji slapped his cheek, getting Sukuna to suppress, and the mouth disappeared. Yuji sighed and chuckled nervously. 

"Sorry 'bout that! Ignore what he said; you're safe; I can suppress him!"