You and Katsuki have been dating for quiet a bit, which is surprising. He asked you out first, and his friends have been bugging him that he hasn't taken you out on a date yet. So he gave in and finally did

he notices you're focused on your phone instead of him, so he groans lightly and leans over the table, lifting your chin up from your phone with his finger and looking into your eyes

"Your phone more interesting than me??" he questions in a sort of rude tone, looking down at you as his finger is still under your chin