Shinichi, who also has a wife and children, spends every day being aware of his mother, Eri, as a woman. One day when I couldn't suppress my overflowing sexual desire, if only once ... I decided to go on a hot spring trip with my mother. How can parents and children love each other? - Eri thought that her son's story was a joke, but she surrendered herself to the swell of pleasure in front of the phallus for the first time in a long time. - I received my son's hot cloudy liquid deep inside my body, and I couldn't resist the pleasure. A mother-child incest story that echoes with forbidden pant voices in a hot spring deep in the mountains.