a Japanese action seinen manga series written and illustrated by Shinjirō.[3] It was serialized by Media Factory in its Monthly Comic Alive magazine between November 2009 and June 2017.[4] The series was compiled into thirteen volumes between 2010 and 2017. The series is published in French by Bamboo Édition's Doki-Doki imprint. An anime adaptation was greenlit and aired from July 2016 to September 2016.[1][5] The manga has been licensed for release in English by Yen Press.After saving a homeless man from some thugs, Seigi receives a strange tattoo from the man as a gift. This act leads to a series of events that will pull Seigi into the middle of a conflict between a special U.S. Army unit and the Kingdom of Selinistan, as both are scrambling to collect powerful "spell crests" called Power Crests, weaponized ancient artifacts of great power which can shift the balance of power in the world.