Ordinary student Norio suddenly becomes the focus of intense, unwanted romantic interest. One day he slips down a flight of stairs and lands in the arms of an attractive stranger, setting off a chain of events that will change his life forever. The encounter unlocks an astonishing truth: there is a hidden society of humans who did not evolve from primates but rather from creatures such as leopards and black bears. Norio discovers he belongs to a rare lineage, and his genetic makeup is now highly sought after. Suddenly he finds himself the target of those who wish to exploit his unique heritage, and he must learn to navigate a perilous modern wilderness if he hopes to survive.
The narrative follows this high‑school boy as he learns that a select group of people share his extraordinary ancestry—humans who trace their evolution to non‑monkey animals. As Norio delves deeper into this secret world, he must confront the dangers that come with being a coveted specimen in a society that sees him as both asset and threat.
