Nez

Thousands of years ago, an ecological catastrophe destroyed almost all life forms on Earth. One of the surviving cities – perhaps the only one – is the domed city of Romdo.

About one thousand years into the future, civilization has been retrograded and humans are living dispersed within small communities. People in this era have a psychic power called "Juryoku" which materializes things they imagine.

After a mysterious war that nearly ended mankind a young girl joins the military of one the few remaining nations left in the world. However war never changes as she is brought into a new war.

The story is set at Myoujou Academy, a private girls' boarding school. The 10th year's Kurogumi class has 12 assassins with their sights on one target, Haru Ichinose.

The Kitauji high school concert band club had at one time participated in national tournaments and was a champion school, but after the club's adviser changed, they have not been able to even participate in the qualifying tournament. However, thanks to the newly appointed adviser's strict instruction, the students are steadily improving and build up their strength.

In the future, life between the digital and physical world has been blurred. The boundary of technology and humanity has been stretched beyond imagination with lives being led in both the electronic and physical worlds.