BKSP-314 Parent-play bath 9: three families share an open-air bath

This release is built around the idea of family harmony hiding a sexual undertone. A mother teaches her two daughters how to please a man, an older sister teases her younger brother until things turn serious, and a father is involved in front of the mother. The three families come together in an open-air bath, and the main scene is set in that hot spring setting.