Humanity Has Declined

Humanity Has Declined is a TV anime adaptation of the light novel by田中ロミオ, produced by AIC A.S.T.A. under the direction of Seiji Kishi, with series composition by Makoto Uezu. Set in a world where human civilization has long faded, Watashi serves as a mediator between the remnants of humanity and the enigmatic Yousei-san, tiny beings who thrive in the world's twilight. Blending Comedy, Fantasy, and Sci-Fi, the series delivers sharp satirical wit beneath its whimsical surface, making it a must-watch for fans of unconventional storytelling and darkly humorous world-building.

In a world where humanity has been quietly fading for generations, dwindling birth rates have caused civilization to shrink to a mere shadow of its former self. Filling the void left behind, faeries — remarkably intelligent creatures standing no taller than ten inches — have spread across the Earth and now claim dominion over lands once ruled by humans. Yet humanity's story may not be finished. Watashi, a young woman returning to her childhood hometown after a long absence, finds herself stepping into the role once held by her grandfather, Sofu — that of an arbitrator tasked with bridging the vast cultural and social divide between humans and faeries. The position sounds straightforward on paper, but the reality of navigating relationships between two very different kinds of beings proves to be anything but simple. What challenges await Watashi as she takes on this unexpected responsibility in a world that has moved far beyond what she once knew?