During a school excursion, Oribe Mutsumi and her fellow students found themselves stranded on an uninhabited island after a plane accident. Thanks to her expertise in wilderness survival, Mutsumi managed to locate her companions and provide help. She predicted that rescue would arrive within three days, a wait that she deemed bearable. Yet, Mutsumi was oblivious to the presence of enormous, fatal bugs on the island. Her background on butterflies, wasps, and other species could potentially aid her friends in surviving and ultimately getting rescued.