Hibino Mirai arrives to an Earth where monsters haven't been seen for twenty-five years. When one appears, Mirai and Aihara Ryu of defense crew GUYS have their first battle, and in the rampage, four civilians, which are medical student Kuze Teppei, motorcyclist Kazama Marina, preschool teacher Amagai Konomi and Spanish League soccer player Ikaruga George, have a chance meeting. (Source: TV Tropes)