Mimu Emilton is a cute fourteen-year-old who has come to the annual Starland Festival to become an idol, just like her role model, Yuri. It is the most celebrated event on a united Earth, and Yuri, now the President of Earth, has encouraged people to join the ranks of Excellent Idols. Unfortunately for Mimu, she can never seem to make it to her audition on time, as misadventure after misadventure lands her in situations (usually involving undergarment exposure, I might add) that she escapes with the help of the current Excellent Idols, whom she befriends. Just as she makes her place on the stage and begins her audition, though, an unknown group of aliens kidnaps her and the Excellent Idols. It is only the beginning of a wild interdimensional goose-chase that places Mimu in the position to save the world, if only she can believe in herself.

The story is set in August of 2026 at the Fuji Training Facility. Natori Touko, a third-year middle school student in the Eastern Private Defense Academy, is entrenched in field training with instructor Kamiya. It has been a harsh training regiment, but it is finally the last day. Kamiya proposes a extracurricular class under the name Newest Weapons Research. But then, an incident occurs that rocks all of Japan.

For thousands of years after its development, mankind used the written word for communication between people and generations. As millenia passed and technology became more prevalent, writing - and thus, communication as a whole - diminished, until it could only be found on cell phones and computer screens. Seeing an opportunity, the sorcerer Sogan Kenzaki starts infecting words with the Nesta Virus, which brings them to life and turns them into monsters called MJBK (Menace of Japanese with Biological Kinetic energy). To counter this attack against humanity, an organization known as DEAVA (Division of EArth Verbalism Ability) assembles a group of youths with the ability of "Verbalism". They have to pilot the vector machines, which are used to form the mechas dubbed "Aquarions". The one wild card in the situation is the self-dubbed "savior", a young man who is the direct relative of a famous calligrapher, named Akira Kaibuki.

Jouji Gouda is a new transfer student at Hakuryo High. He fell in love at first sight and boldly proposed to Akane Suzumiya, representative of his class, on his first day at the new school. Although Akane finds him very annoying, hot-blooded and simple-minded Jouji never gives up and would do anything to express his love towards Akane.