Genre: Adventure, Romance, Science Fiction

The civilization on the Earth was destroyed by permanent abnormal climate.
In these days, cities of one million people had been built on the moon, and they became the only place where human-race survived. The people left on the moon declared the foundation of Republic Eden. Then, they have been expanding the cities that loved peace and freedom. However, a boy's act would shake Eden's freedom and peace later.

More than 160 years have passed since then.In Eden, the children finish their compulsory education when they are 15 years old. Then, they become parts of the society as citizens. During their brief moratorium, they are given freedom. Like other boys, Takeru is going to take part in a race with his friends. It is a race of machines perucilar to the moon called "Vehicle". What is different from other boys is Takeru made his vehicle by himself. By this act, Takeru touches the secret hidden in Eden.