Just as high schooler Taiju Ooki is about to confess his feelings to Yuzuriha Ogawa, a mysterious green light engulfs the Earth, petrifying all of humanity. Millennia pass, and Taiju awakens to a world where civilization has vanished, and nature has reclaimed the planet. He soon reunites with his genius friend Senkuu, who has already been awake for some time and is determined to restore human civilization through the power of science.

Taiju’s physical strength and Senkuu’s brilliant intellect form the foundation of their partnership as they work together to uncover a way to revive those still petrified. However, as they begin their efforts to rebuild society, they encounter others who challenge Senkuu’s vision of restoring the scientific world. Amid these growing tensions, the mystery behind the petrification event lingers, driving them to discover the truth behind humanity’s downfall.