BKH-370 Mother and Child Intimacy: Mount Nyoho Road – Wakana Ninomiya

A streaming-exclusive special edition that adds 26 minutes of bonus footage, including image scenes and solo scenes not included in the standard version of Mother and Child Journey: Higashi Shirakawa Route. Below is the synopsis for the standard version:

Waka, who lost her husband, lives alone with her stepson. In truth, they had long been aware of each other as members of the opposite sex. Once in the past, the two made a single mistake. The time that had stopped since then begins to move again during a hot spring trip they take together. The son approaches his mother, and although she knows it is wrong, she seems to have been waiting for this moment and accepts him. As she is caressed by her son, her body grows warm. Overcome by desire, they give in to their forbidden feelings and are drawn to each other again and again in this taboo family drama.