Akari, a woman sentenced to death for a crime, spent her days in prison terrified of her execution. But she was chosen as a subject for the prison breeding plan. This insane plan reduces the sentences of female inmates in exchange for making them give birth as part of measures to combat the declining birthrate. For Akari, who had only been waiting for her death sentence, there was no room for refusal. To survive, she becomes the wife of three male prisoners and is fucked daily. This daily routine will never end until she becomes pregnant.