Nana and her son Satoshi moved to a remote southern island. Though they were step-mother and step-son—Satoshi being the child of Nana's husband, Ryoji—they fled together to escape Ryoji's abusive behavior. Life on the island proved harsh, and Nana struggled to survive, working tirelessly in vast sugarcane fields while attracting unwanted attention from local men. Yet Satoshi protected her not just as a son would, but with growing romantic desire. Gradually, Nana began to accept these feelings—until Ryoji suddenly reappeared, sparking new turmoil.