Aurthors: Tanaka, Romeo (Story), Yamazaki, Tooru (Art)
Status: Publishing (up to volume 3)
Published: May 29 2007 -
Alternative title: Humans have declined
Synopsis: It's been several centuries since human beings declined due to the steep drop of birthrates. The most prosperous species on the earth are the "Fairies": 10 cm tall creatures with high intelligence. I am a UN arbitrator between the humans and the fairies. I thought my job would not be a tough job, and visited a fairies' habitat...
This book also ranked 17th in 2008's このライトノベルがすごい！（this lightnovel is great!）
I hope KEY won't fire him for ignoring his own proper occupation.^^joking
BUT i do wonder whether he has so much time outside REWRITE.
Finished up to the newest volume 3. I expected this novel is a slice of life one, but it was true only to the first volume. The story got chaotic and chaotic. I didn't expect I saw a time-space theory in this novel. The fairies are so adorable and attractive in their unique character.