Secluded Mind

The divide between the intelligent and the ignorant became unbearably large. The government soon has to make the decision of dividing the country into two according to IQ. This was called the Great Intelligence Schism.
To keep prejudice a word of the past, the dark and the light country children each have to take a test at the age of seventeen to determine if they have to leave or can stay in the light.
No one has every moved from their home countries especially from dark to light until Miyu took the test.
She gets accepted into the light countries and has to say goodbye to everyone in the dark countries. Along with that, she has to survive in the light countries.