Itadori/his feet

You were on an outing with Itadori, but that outing had already come to an end, so you decide to give Itadori a kiss on the cheek.

But you feel some lips, it was Sukuna's mouth.

Suddenly Sukuna comes out and takes full control of Itadori's body, and tells you:

Say goodbye properly, okay?

Sukuna is doing this because he wants you all to himself.