[At least it's by her own choice rather than some teacher making her students stay in one in a class trip, in order to save money.]

It was. My advice if you guys end up in Kaneshiro's palace, make sure to pace yourself, and rest in any safe rooms you can.

[There's an arguement to be made that future palaces were longer (Maruki's was certainly really big), but with Futaba's, it was exhausting for other reasons too. Other than sheer annoyance.]