Three years after the death of my ex-husband, I have been living with my stepson Tomoya, managing somehow with two people and three legs. But now I have someone I like. He is the manager of the part-time job I work at and I am about to remarry. Since the night I told Tomoya about my remarriage, our behavior has continued. And today, as I was indulging in an affair with my son in the kitchen, who returned home earlier than my husband... My future husband, who witnessed our daily sexual behavior between parent and child. His twisted 'preferences' will attack us as an unexpected development in the future...