Three years after the death of my ex-husband. My stepson Minoru and I have managed to live together, two people, three legs. But I have someone I like now. He's the manager at my part-time job and we're getting remarried soon. However, Minoru and I have been engaging in sexual activities since the night I told him about my remarriage. And today, as I was having an affair with my son in the kitchen, who had come home earlier than my husband... My future husband, witnessing our daily sexual acts between parent and child. His twisted 'preference' will attack us as an unexpected development in the future...