(The author hereby declares he) In a parallel world, technology is very advanced, but resources are seriously insufficient, so the leaders assign those who are useful to mankind to the city, and the remaining people to the outside of the city. The protagonist's parents are unknown, and she lived with the teacher and senior sister who raised her since she was a child. Later, the teacher was killed, and she met an "outsider". She slowly discovered the truth of the world.
Purpose: Strive to discover unknown things