"Yuna" is a woman who provides a service to wash her back at public baths and hot springs. Even today, there are rumors that there is an inn that secretly offers such a service, and men with high expectations visit the hot spring inn. Then there is the appearance of a hot spring woman who offers a wonderful service as rumored! Titty fuck, orgy, mat play... Men are very excited about various services! A modern-day hot spring woman can go this far.
