Neppuu Kairiku Bushi Road

After an asteroid brings the toxic poison known as “shinobi” to Earth, the world sinks into despair. Survivors flee to Kairiku—land that was once the ocean floor—where they struggle to shield themselves from the poison’s lingering effects and carve out a place to live.

Amid the ruin, hope centers on two legends said to be key to resisting shinobi: the Holy Weapon Giga Road and the famed warrior Yagyuu. Ame, a princess from a fallen nation, rises to pursue that last chance and fight for the world’s future.