For thousands of years following its invention, humanity relied on the written word to communicate across individuals and generations. As millennia passed and technology grew more dominant, writing—and consequently, communication in general—declined, eventually surviving only on cell phones and computer screens. Spotting an opportunity, the sorcerer Sogan Kenzaki begins infecting words with the Nesta Virus, which animates them and transforms them into monsters known as MJBK (Menace of Japanese with Biological Kinetic energy). To combat this assault on humanity, an organization called DEAVA (Division of EArth Verbalism Ability) gathers a team of youths possessing the power of "Verbalism". They must pilot vector machines, which are utilized to construct the mechas referred to as "Aquarions". The situation's one wild card is a young man who calls himself the "savior" and is the direct relative of a renowned calligrapher, Akira Kaibuki.