A hot spring bust-up tour where small-breasted girls who want to make their boobs bigger come together and rub them! Being rubbed all the time?

Small-breasted girls gather at the phantom secret hot spring ``Oudan Onsen'', which has the effect of enlarging the bust and pinking the areolas, and has the effects that women envy! In the public bath, we all have a fir-fir class! Do it yourself first! Next is next door! Get in line and go from behind! At the end, everyone formed a circle and fidgeted together! A wonderful lecture using a secret hot spring will heighten the sensitivity of the girls, and in the second half there will be an individual lecture in a private open-air bath! However, the person who performs this is a man! The girls are embarrassed just to be seen naked, but all the pressure points of the breasts, nipples, neck, etc. are stimulated... gradually they start to feel it, and they can't control their excitement and move their hands to their dicks...