In the boy version, the scene to unlock the hot springs was also Flora's blue
heart event. The event is kept in the girl version, but of course it is not
a heart event. You must befriend her to over 250 FP (showing her your cat or
dog over and over in the mines will add 1 FP each time - it takes a little
while to do, but it's free) then go from Vesta's farm area up to the
excavation site area between 11:20 pm and 12:00am, on a sunny day that is not
a Sunday. (Note: You might get a scene of Flora doing kung fu instead - if
so, then just walk back down to Vesta's farm and then back up and the real
scene should trigger.) This will unlock the hot springs by the circus
grounds. If you use these hot springs 100 times or more, the mayor will pop
up and tell you he's building a hot springs by the Goddess Pond too. The
difference between the two is that the Circus Ground Hot Springs reduces your
Fatigue, and the Goddess Pond Hot Springs restores Stamina. You will
restore/reduce about 60 points of each in one hour of soaking.
You also use these hot springs to rescue a couple of the sprites. The
difference is that for the Sprite requirements, you must rest at least in
hour in the hot springs each time. For unlocking the Goddess Pond Hot
Springs, you can jump in and out of the Circus Ground Hot Springs very
quickly to get to 100 times.