How could he not trust that smile? Someone, tell him! (No, don't. Don't break his spirit this early.) He smiled an honest smile back, the kind that's bright enough to burn the eyes of the unprepared.

"Yeah, I understand, senpai!" No, he didn't. "Sunday afternoon's fine!" He took a second to process, before tilting his head. "Should we exchange numbers, in case something comes up?" When he'd planned one or two things before, he'd been stood up and told that they'd wanted to contact him, but didn't have his number.

So, with that in mind, he'd written it into his heart to not have no means of contact with someone if he was going to do something with them! It just made sense, anyway.