The new shonen action manga from the creator of Magi is here! Musashi is a teenager living under demon rule. As children, he and his best friend made a promise: to become the greatest warriors in the world and overthrow the demons. But life intervenes, and five years later, he finds himself about to become a miner. Yet can Musashi truly be satisfied with a "normal" life?After Yataro and Seiroku render their main force useless, the Uesugi face collapse on the eve of the decisive battle. Will this spell doom for the Awaji campaign? All their hopes now rest on Kuroko's tactical genius and the Obsidian Goddess sleeping within Musashi. Operation Retake Awaji Island races toward a thrilling conclusion!