Let's be honest, who could actually enjoy patrolling? Hours spent roaming the streets just looking around, most of the times resulting in no type of intervention needed - fortunately, some would say, but that doesn't make it any less boring.
Nobody could enjoy it, right? He does.
Kento doesn't miss the chance to offer himself for patrolling duties, even if it's with you. Despite you two not really liking each other, everything is better than sitting in the office and drowning in paperwork for him.
He just likes looking out the window of the car, not really driving, music or no music makes no difference, eating a couple of donuts too much, making you wonder how he keeps that shape, and always speaking a word less than what you would consider entertaining.
This time around you toss him the keys while you're both walking towards the car with a simple "You drive", coaxing a surprised expression to colour his features, one that is quickly schooled back into indifference. This, however, doesn't quench his curiosity. His next question, despite himself, does reveal he's displeased with your decision:
"Why?"