Onijima Takashi (voiced by Mao Ichimichi), who has learned a lot of survival skills from his father since childhood, Suzumori Asuka (voiced by Hikazu Kono), a super athletic girl who joins both the track and field team and the basketball team, Amaya Mutsu (voiced by Kiyono Anno), who has a high IQ and the appearance of a good student, but is actually a super rotten girl, and Kujo Shion (voiced by Azumi Waki), a rich girl who is arrogant and venomous, but actually wants to be recognized and liked by everyone. In an air crash, these four female high school students became survivors and drifted to an uninhabited island. How should high school students who have always been sitting in the classroom to learn book knowledge deal with the extremely harsh and extreme conditions on the island? Soon they will know that if they want to survive in the laws of nature, they have to give up a lot of things.