After five years of keeping his feelings unspoken, high school student Taiju Ooki is finally prepared to confess his love to Yuzuriha Ogawa. However, just as Taiju starts his confession, a blinding green light hits Earth and petrifies humanity worldwide—turning every human into stone. Thousands of years later, Taiju wakes up to discover that the modern world has completely vanished, with nature having flourished during the time humanity stood still. In this world of stone statues, Taiju meets one other living person: his science-obsessed friend Senkuu, who has been awake for a few months. Taiju finds out that Senkuu has devised a grand plan—to fully revive civilization using science. Taiju's physical strength and Senkuu's intellect combine to create a powerful partnership, and they soon discover a way to bring the petrified back to life. Nevertheless, Senkuu's master plan is jeopardized when his ideas are challenged by those who awaken. Meanwhile, the cause of humanity's petrification remains unknown.