Element Hunter

The elements are vanishing! The future is entrusted to us! In 2029, a massive land subsidence occurred along the Mediterranean coast. Oxygen suddenly disappeared from the Earth's crust in an area three kilometers in diameter. Since then, various elements on Earth have been gradually disappearing. The disappearance of elements has caused forests, fields, buildings, and ancient ruins to vanish, taking life with them. Humanity deeply feels this pain: "All things exist because of the elements." Sixty years after that day, the population has decreased to one-tenth of its peak. Through diligent investigation, the whereabouts of the vanished elements were determined. It turns out they flowed into another Earth on the other side of the dimensional wall, known as "Negative Earth." To secure the survival of Earth, an organization called "Element Hunters" was established. All members are children under the age of 13. Only children, whose brain tissues are more flexible than adults', can connect with Nagaia...