Am I the only one confused by the fact that they wash up without swimwear (on page 17)?
If you're required to wear to protect the guests' privacy in a mixed bath setting, once you enter you obviously don't take off the swimwear. The washing scene should have come in the non-mixed changing rooms, before putting on the swimwear and actually entering the springs!
And those are some very big specimens of demi-humans. Considering how the frogs are normal-sized, it's pretty surprising to see that all the demi-humans shown in the hot spring are giants. I'd understand the lamia being long, but she's about as huge as the minotaur. And foxes are quite small and light so the giant fox lady is certainly something.