Sanae Kitamura is a 50-year-old woman. Although I have no particular dissatisfaction with my husband, I ended up becoming involved with my son. For some reason, I found myself irresistibly drawn to this relationship. Now, when my son gropes my breasts and whispers in my ear, "Dad hasn't come home yet," I can no longer hold back. Living this way, I'm constantly anxious about what would happen if my husband found out. Our relationship has become something that must remain a secret from him.