Having nursed unspoken affections for years, high schooler Taiju Ooki gathers the courage to confess his love to Yuzuriha Ogawa. But as he starts to pour out his heart, a brilliant green light strikes the planet, turning humanity into stone statues. Millennia later, Taiju emerges to a world reclaimed by nature, encountering his science-savvy comrade Senkuu, who has been awake for months. United by Taiju's strength and Senkuu's intellect, the duo embarks on a mission to resurrect civilization through scientific innovation. Yet, their quest faces opposition from fellow survivors with conflicting beliefs. Amid this struggle, the mystery behind the global petrification lingers, casting a shadow over Senkuu's ambitious restoration plans.