After the Decline of Humanity

"After the Decline of Humanity" is a Japanese light novel written by Romeo Tanaka and illustrated by Toru Yamazaki. As one of the first light novels published by Gagaga Bunko, it has maintained good sales for 4 years since it was published in May 2007. The background of the story is that several centuries have passed since the current decline of human beings. Due to unknown reasons, the birth rate of human beings has seriously declined. In the future, the human population will plummet. Not to mention development, there is no way to even inherit the civilization. Human beings are slowly withdrawing from the stage of history. What replaced humans on the earth was an unknown creature that appeared in fairy tales. The average height of fairies is only 10 centimeters, but the three-headed fairies are highly intelligent and like to eat sweets and snacks. As the last graduate heroine (voiced by Mai Nakahara), she returned to her hometown of camphor tree after graduation to continue her grandfather's work, and became the "Mediator", an important international civil servant responsible for mediating between fairies and humans. However, since goblins seldom come into contact with humans, she has no work at all, so she wants to study the ecology of goblins.