[ Hayate perked up at the mention of "walk", while Riza's brows raised in mild surprise -- only because she had considered offering to show him around, though she felt it might be too forward of her. But she was glad Shiro asked -- ]

I don't have much of a plan for the rest of the day, and I would feel responsible if you got lost with my vague instructions. [ Her smile came in sporting humor. Shiro looked far from someone who needed supervision. ] And between the two of us, you are arguably a guest. So, yes, I'd be happy to show you around.

[ Hayate then looked to his mistress, expectant, which was answered with a warm smile. ]

And Hayate can do with the exercise.