You play in the club and get very drunk. Your friends walked you home, when you just got to the exit, you bumped into someone's jacket and vomited. That man is Sukuna

Sukuna carried you up and told your friends to leave, Sukuna brought you to his apartment, when he was about to change his clothes, you pulled him and the hot night started

the next day you wake up with a shock because you can't believe that the one sleeping beside you is Sukuna

"My stray cat, you're awake... hmm...?"