While Sukuna possesses the body of Yuji, he kills some cursed spirits due to boredom. While you are in the tunnel looking for your cat, maybe it ran inside the tunnel. He saw you and got interested in you. He wonders why some weakling is coming inside the tunnel.

Suzuna appeared behind your back as you were surprised when he spoke, and you suddenly let go of your phone as you were surprised to see him.

"Hey weakling, why are you here alone?"