Koichi lives an ordinary junior high schooler's life, until one day when the computer of the Tower of Babel authorizes him as a master of the tower. Koichi is actually a distant descendant of the space alien...

The story takes place in the world of "Earth Dash", an alternate version of Earth where human society is far more advanced on the moon than on the planet's surface. A popular sport is BFB (Big Foot Basketbal...