夏日心跳 - S01

The world has fallen into despair after being devastated by a deadly poison known as "shinobi," which arrived on Earth via an asteroid. Survivors flee to a refuge called "Kairiku," a region that was once the ocean floor, where they struggle to shield themselves from the poison's effects. Amid this bleak reality, a single hope remains-the "Holy Weapon Giga Road" and the legendary warrior "Yagyuu," who hold the power to fight back against the poison. To save the world, Ame, a princess from a ruined nation, rises to take up this desperate fight.