One day, a boy who was yearning about the universe perceives an extraordinary noise from outer space.
He found out that "Braneworld" was the source of that noise. In order to ascertain the origin of the noise, he took off for the megacosm.
Meanwhile, a boy who suffered from unknown headache, realizes about the reason of that aching pain.
When these two boys, who live in a different time axis, are aware of the structure of the world, they converge to the intersection of a certain parallel world.