This book comes from a continuous dream of mine. In my dream, there was a long bridge, and in the center of the bridge was a thick fog. I could wake up through the thick fog, and beyond the thick fog was a world where humans and foreign objects coexisted.
Ordinary human beings are only aware of the existence of foreign objects, but have no ability to perceive them. Ordinary foreign objects cannot make an impression on humans. However, some humans are endowed with "gifts" and can sense the existence of foreign objects when they are born. They awaken at the age of fifteen and have the ability to bind foreign objects.
But the girl in the dream is an alien, she only has the ability to "perceive".