[He didn't expect for her to hang up. That's the last thing he thought she'd do. Maybe come after him with a weapon, or whatever kind of kagune she was hiding on her back, sure. After all, he was basically saying he knew she was some sort of 'monster', even if he had zero plans on actually reporting her for it.

He stares at his phone in slight disbelief, but a smile nearly crosses his face as her image flashes over the screen again. Calling back. She must have did it by accident, or in shock, something...]

...Did I startle you that much? My bad, honestly. Don't worry about it.

You aren't the first cute girl to hang up right in my face. [Nothing's changed--you're still going to be treated like normal.]