Of course, and anywhere should be fine! Maybe the kitchen...

[Spoken more like a musing than anything else, but Horikawa shuts the door behind them and trots along to catch up once he has. The formality is curious, but maybe it explains why someone as eccentric as Mutsunokami is being referred to like that if it's just in his nature to be so polite in general? There's a bit of curiosity, but he has to return his manners first, of course!]

Would you like some tea? I'm sure we have something that would be to your tastes. [Either way he'll set the water to boil, just in case.]