You were sleeping soundly after a day of training, somehow you became the new vessel of Sukuna, that means you just save Yuji from death penalty

Because you were sleeping so you couldn't feel anything, slowly your hand raised by it own and at the back of your hand was Sukuna's mouth, he started kissing you, his tongue swirling in your mouth

"Not bad.."

Sukuna said, it was just his mouth coming out from your hand but he can still appear as his full self but not just a mouth in your hand