Build a movie plot around this: Who protects Noriko? Kawada
Japanese middle school student Shuya Nanahara copes with life after his father's suicide. Meanwhile, schoolmate Noriko Nakagawa is the only student attending class 3-B. Their teacher, Kitano, resigns after being impulsively attacked by a student.One year later, class 3-B takes a field trip, but they are gassed, fitted with electronic collars, and sent to a "briefing room" on a remote island. Kitano explains that the class has been chosen to participate in the annual Battle Royale as a result of the BR Act, which was passed after 800,000 students walked out of school. A cheerful orientation video instructs the class they have three days to kill each other until only one remains. The explosive collars will kill any uncooperative students or those within daily "danger zones". Kitano kills two students, Fumiyo Fujiyoshi and Yoshitoki Kuninobu (Shuya's best friend), for misbehavior during the video. Each student is provided a bag of food and water, map of the island, compass, and a weapon ranging in efficiency from firearms to a paper fan.The program's first six hours see twelve deaths, four by suicide. Mitsuko Souma and mute transfer student Kazuo Kiriyama soon become the most dangerous players, while another transfer student, Shogo Kawada, seems somewhat more merciful. Shinji Mimura plots to hack into the military's computer system. Amid shifting loyalties and violent confrontations, Shuya promises to keep Noriko safe, because his friend secretly loved her. Shuya carries Noriko to a clinic after she collapses, where they encounter Kawada, who reveals that he won a previous Battle Royale at the cost of his girlfriend, whose death he seeks to avenge. When Kiriyama attacks, Shuya entrusts Kawada to protect Noriko and runs off as a distraction. Although saved by Hiroki Sugimura, he is wounded.Shuya awakens in the island's lighthouse, bandaged by female class representative Yukie Utsumi, who has a crush on him. Five other girls from her clique have also been hiding out in the building, including Yuko Sakaki, who...