Futo Urushida, a gloomy and unremarkable high school boy, suddenly awakens to find himself mysteriously transported to a deserted island, still wearing his school uniform. After saving Mai Natsume, a popular and outgoing influencer known as an untouchable beauty at school, the two end up teaming up to survive on an island overrun with monsters. With both teachers and students all transported to the island, the situation quickly spirals into chaos. As Futo faces countless trials, he strives to grow stronger and find a way to escape.