The new case is a surprise to Yousuke. He tells Naoto that—that the phone's been silent—and Naoto admits he's been rerouting the calls.
Yousuke hates him, in that moment. How Naoto's been walking on tiptoes around him, watching him like he's waiting for a breakdown. "I'm fine," he says.
"You don't have to accompany me," Naoto says in that reasonable voice. "I'm well defended, even on my own."
"I'm fine. I have my knives—I'm well defended too. I can do my job."
He's mouthing off to his boss.
But Naoto just nods grimly and lets him follow.