A sister who is physically weak and unable to have children. Her younger sister, Hina, who was asked by her older sister, "I want you to have a child-making sex with your husband." She agrees for the sake of her beloved sister, but contrary to Hina's innocent feelings, her brother-in-law drowns in Hina's young body and forgets her. And as her brother-in-law's demands gradually escalate, changes occur in Hina's mind and her body...
