During a school excursion, Oribe Mutsumi and her peers survived an airplane disaster and were marooned on an unknown island. Mutsumi, with her wilderness expertise, found other survivors and tended to their needs. Despite the challenges, she maintained optimism, thinking rescue would come within three days. Little did she know, the island was crawling with mammoth deadly bugs. Her extensive knowledge of butterflies, wasps, and beyond might be the sole factor saving her classmates until help arrives!