Summary Humanity has Declined, Are You Sure from Kainu Manga
Humanity has Declined, Are You Sure summary: It\'s been several centuries since human beings declined due to the steep drop in birthrates. The most prosperous species on the Earth are \"Fairies\", 10 cm tall creatures with high intelligence. I became a UN arbitrator between the humans and the fairies and returned to my hometown to help my grandfather. I thought my job would not be a tough one and visited one of the fairies\' habitats to say hello to them but…