Aoki Soubi is an orphan who travels to his mother's island hometown. Upon arriving he meets Tenyuu who warns that only men inhabit the island. Tenyuu know who Aoki is and kidnap him, telling him that he's the last of a bloodline that can bear female children. Tenyuu and his brothers, Yuki and Kaitou, become Aoki's lovers wanting to impregnate him.