A sister who is physically weak and cannot have children. Such a sister asks her younger sister, Hina, 'I want you to have sex with my husband and make a child.' Hina agrees for the sake of her beloved sister, but contrary to Hina's pure and innocent feelings, her brother-in-law becomes engrossed in Hina's young body and loses himself. As his demands escalate, changes begin to occur in both Hina's heart and body...
