Orient 16 by Shinobu Ohtaka (Paperback)

"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? THE SCABBARD OF THE GODDESS Kojiro is left mystified after seeing a vision of his deceased father, Jisai, who begs him to become ""the scabbard of the Obsidian Goddess."" Kojiro seeks out Shishikado Hojo for answers, whereupon Shishikado recounts the tale of Jisai's heroic deeds and tragic demise. With the mystery of Jisai's death revealed, Kojiro begins his true battle to reclaim the Land of the Setting Sun."