Nanako was in a good mood and pulled her husband's arm to the inn because it was a hot spring for the first time in a long time. A close family, everyone would think so, but in reality, the mother and son had a secret that their husband did not know. From when, Nanako had a relationship of love many times when she noticed her son. Heal your daily fatigue at the hot springs and enjoy delicious food and sake. When her husband got drunk and fell asleep, Nanako changed from her mother's face to a woman's face. Mother and son staring at each other. They were completely in heat and silently sought each other. He culminated many times, took the spirit of his beloved son deeply, and kissed him like a lover. Without knowing that this secret relationship was being seen by anyone ...