His wife passed away in an accident. He wanted his son, who was in high school, to have a full life and be surrounded by love, so his father married a new wife, Kurata. But he did not expect that marrying a young wife would be a very wrong decision for him. Her love and care for her husband's child gradually turned into a feeling like a loving couple. Then, when the husband is at work, it is a good time for them to easily express that feeling. Even when the husband is at home, they still have these incestuous love affairs together.
