[someone else might have pointed out that Ai doesn't seem to be taking that line of thought to heart. Keiwa's just Keiwa though, so he - at most - gives her a slightly doubtful look]

It shouldn't get busy again on the cafe side for a few hours, so I don't think anyone would bother you back here.

[he actually looks around to double check, but it's hard to spot this table from the doorway. Even without the line of sight to the doorway, they'd have to get past both Keiwa and Nanami watching the cafe (and Tsukasa getting underfoot) to get here. Something seems to occur to him while he's looking around though, and he turns back to Ai]

Um... Ai-san, can I ask for your opinion on something?