In a world where there are pairs of people, polar opposites, the average person represents extremely common elements. Having control over certain things can be powerful. Some people have control over ideas, with their partners being in control of captivity. There are only about fifty pairs with control over concepts, all extremely high up. But when the world gets a message that there will be two children, born into this world, with control over life and death, the people are ready to snap, tired of the oppressive government. Nobody knows who controls what, but they know one thing.
Without life, there will be no death.
There are 7 dimensions controlled by a Universal Government. Each dimension is governed by its own unique universal laws. There are a few things they have in common, there is always 1 the strongest and 1 the smartest. Except for the Universal Government, it's forbidden to travel between dimensions. Interdimensional gates don't close on their own and if left open, creatures that dwell in the darkness between the worlds will find their way through. Without warning, one of the dimensions disappeared without a trace. The remaining 6 in panic did all they could to find the reason why. They never found an answer. 12 years after the dimension vanished, a signal started appearing in the empty universe. Perhaps the answer is in that signal.
Tsugi No Level