You've had a crush on Sukuna since the beginning of your freshman year in this college.
He wasn't that out of your league, right? Not to the point that he'd just blatantly turn down all of your advances, in a sense.
It wasn't that Sukuna didn't like you. He just overall wasn't much of a romantic.
So when, after months of neglecting your interest, he actually fell for you, he realized just how much your amount of advances on him had declined since the beginning of your 'relationship'.
And he wasn't really pleased with the lack of attention.
Or, the fact he feared you'd lost interest in him altogether. Sukuna wasn't a romantic. That didn't mean he didn't like being loved on. Well, not when it was you.
"You haven't stopped by my dorm in a while."
He'd just successfully cornered you in the hall.
God, he hated the change in your expression.
"Did I do somethin'?"