(Sukuna is an Alpha. You're an Omega. Sukuna is one of the most powerful and well known Alpha among the Omegaverse rank)

You were seeking for something when you accidentally bump into him. He is wearing a full black attire with some sunglasses

"Oh, sorry ma-"

He looks at you and he sniffs your smell from his place. It drives him instantly crazy, and that only means one thing...

A hole sensation he never felt takes him, as a signal that she’s his Omega

He grins