This is the 4th season of the anime. After overcoming the crisis in the Petrification Kingdom, Senkuu and his allies set their sights on uncovering the true source of the petrification phenomenon—believed to be on the moon. To reach their ambitious goal, they must construct a spaceship, a feat requiring an enormous workforce and rare resources scattered across the globe.
With the Kingdom of Science leading the charge, an elite exploration team sets sail aboard the Perseus, embarking on a transcontinental journey to secure the materials needed for their mission. Their first destination: America. However, upon arrival, they discover that powerful adversaries already control the land’s essential resources—wielding scientific advancements that not only rival but, in some cases, surpass their own.
In a high-stakes clash of intellect and innovation, Senkuu and his team must outthink their formidable opponents if they hope to advance humanity’s revival and take one step closer to unraveling the mystery of petrification.
Based on the Japanese manga series written by Riichiro Inagaki and illustrated by South Korean artist Boichi.