Kuga Masaya travels to a remote island to claim his inheritance following the death of his father, the local doctor. As he settles in and meets the beautiful women of the island, including his step-sister, he finds himself plagued by vivid, erotic dreams where he engages in passionate encounters with the local residents, blurring the line between his new reality and his carnal fantasies.
Masaya, the island's headmaster and designated "life-giver," faces the pressure of continuing his bloodline. Despite their sibling bond, Asuka expresses a deep longing to become his bride and bear his children. Caught between duty and desire, Masaya engages in an intimate encounter with Asuka and Yoshino, ultimately fulfilling his role as the headmaster to ensure the lineage survives.