I like it when they get to interact outside the manga cafe. It's an opportunity to help develop their relationship from just staff<->customer into two close acquaintances meeting somewhere else unrelated to work, but for now this is just a reversal into customer<->staff... also, other readers are right. Number exchange when?
I was going to say the kids were nice for apologizing to Toshi thinking he was a customer in line, but then one of them subconsciously(?) channeled his inner erogaki. Watch out, that kid could end up growing up into a menace. And then that kid made me remember that awful, sleazy beach chapter that never should have happened. Dangit, author. Now I'm gonna have to huff copium that it wasn't canon since Toshi wasn't in it anyway.
F for the hair tie. Your valiant service will be remembered. Good thing she actually had that hair tie on her, because without it I reckon the wardrobe malfunction could've been worse...