When the new century arrived, so did they. Until now, the Japanese government has managed to keep the mass media from exposing the fact that the future of humankind hangs in the balance... that people are being reborn as a new, evolved form of life.

Exactly what triggered the birth of this creature known as "Evolution" is unclear...

Kazuya Fuwa, a less-than-perfect university student, and his childhood friend Amane Saionji were leading perfectly happy ordinary lives. But beneath the peaceful surface of their town, Evolution was waiting...

(from Hirameki)